sh: intc - add support for SH7706, SH7707, SH7708, SH7709

This patch unifies the cpu specific interrupt setup code for
sh7706, sh7707, sh7708 and sh7709 and moves the code into a new
file called setup-sh770x.c.  It makes sense to share the setup code
between these processors because most hardware blocks are identical
from a software point of view. With this patch the sh770x processors
now have a complete set of vectors that match with the information
provided by the data sheets. This is a big improvement for sh7708.

Vectors for IRQ4 and IRQ5 are enabled by default. Use
plat_irq_setup_pins() if pins IRQ0-3 should be used in IRQ mode.

This patch also unifies the platform device setup code which means
that the rtc driver now has platform data for all sh770x processors.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/Kconfig

@@ -71,19 +71,21 @@ config CPU_SUBTYPE_SH7705
 config CPU_SUBTYPE_SH7706
 	bool "Support SH7706 processor"
 	select CPU_SH3
-	select CPU_HAS_IPR_IRQ
+	select CPU_HAS_INTC_IRQ
 	help
 	  Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 
 config CPU_SUBTYPE_SH7707
 	bool "Support SH7707 processor"
 	select CPU_SH3
+	select CPU_HAS_INTC_IRQ
 	help
 	  Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 
 config CPU_SUBTYPE_SH7708
 	bool "Support SH7708 processor"
 	select CPU_SH3
+	select CPU_HAS_INTC_IRQ
 	help
 	  Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 	  if you have a 100 Mhz SH-3 HD6417708R CPU.
@@ -91,7 +93,7 @@ config CPU_SUBTYPE_SH7708
 config CPU_SUBTYPE_SH7709
 	bool "Support SH7709 processor"
 	select CPU_SH3
-	select CPU_HAS_IPR_IRQ
+	select CPU_HAS_INTC_IRQ
 	help
 	  Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.