ARM: use "depends on" for SoC configs instead of "if" after prompt

Many ARM sub-architectures use prompts followed by "if" conditional,
but it is wrong.

Please notice the difference between

    config ARCH_FOO
            bool "Foo SoCs" if ARCH_MULTI_V7

and

    config ARCH_FOO
            bool "Foo SoCs"
            depends on ARCH_MULTI_V7

These two are *not* equivalent!

In the former statement, it is not ARCH_FOO, but its prompt that
depends on ARCH_MULTI_V7.  So, it is completely valid that ARCH_FOO
is selected by another, but ARCH_MULTI_V7 is still disabled. As it is
not unmet dependency, Kconfig never warns.  This is probably not what
you want.

The former should be used only when you need to do so, and you really
understand what you are doing.  (In most cases, it should be wrong!)

For enabling/disabling sub-architectures, the latter is always correct.

As a good side effect, this commit fixes some entries over 80 columns
(mach-imx, mach-integrator, mach-mbevu).

[Arnd: I note that there is not really a bug here, according to
 the discussion that followed, but I can see value in being consistent
 and in making the lines shorter]

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Jun Nie <jun.nie@linaro.org>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Krzysztof Halasa <khc@piap.pl>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-at91/Kconfig

@@ -9,7 +9,8 @@ menuconfig ARCH_AT91
 
 if ARCH_AT91
 config SOC_SAMA5D2
-	bool "SAMA5D2 family" if ARCH_MULTI_V7
+	bool "SAMA5D2 family"
+	depends on ARCH_MULTI_V7
 	select SOC_SAMA5
 	select CACHE_L2X0
 	select HAVE_FB_ATMEL
@@ -21,7 +22,8 @@ config SOC_SAMA5D2
 	  Select this if ou are using one of Atmel's SAMA5D2 family SoC.
 
 config SOC_SAMA5D3
-	bool "SAMA5D3 family" if ARCH_MULTI_V7
+	bool "SAMA5D3 family"
+	depends on ARCH_MULTI_V7
 	select SOC_SAMA5
 	select HAVE_FB_ATMEL
 	select HAVE_AT91_UTMI
@@ -32,7 +34,8 @@ config SOC_SAMA5D3
 	  This support covers SAMA5D31, SAMA5D33, SAMA5D34, SAMA5D35, SAMA5D36.
 
 config SOC_SAMA5D4
-	bool "SAMA5D4 family" if ARCH_MULTI_V7
+	bool "SAMA5D4 family"
+	depends on ARCH_MULTI_V7
 	select SOC_SAMA5
 	select CACHE_L2X0
 	select HAVE_FB_ATMEL
@@ -44,7 +47,8 @@ config SOC_SAMA5D4
 	  Select this if you are using one of Atmel's SAMA5D4 family SoC.
 
 config SOC_AT91RM9200
-	bool "AT91RM9200" if ARCH_MULTI_V4T
+	bool "AT91RM9200"
+	depends on ARCH_MULTI_V4T
 	select ATMEL_AIC_IRQ
 	select ATMEL_ST
 	select CPU_ARM920T
@@ -56,7 +60,8 @@ config SOC_AT91RM9200
 	  Select this if you are using Atmel's AT91RM9200 SoC.
 
 config SOC_AT91SAM9
-	bool "AT91SAM9" if ARCH_MULTI_V5
+	bool "AT91SAM9"
+	depends on ARCH_MULTI_V5
 	select ATMEL_AIC_IRQ
 	select ATMEL_SDRAMC
 	select CPU_ARM926T