ARM: 8788/1: ftrace: remove old mcount support

Commit cafa0010cd ("Raise the minimum required gcc version to 4.6")
raised the minimum GCC version to 4.6. Old mcount is only required for
GCC versions older than 4.4.0. Hence old mcount support can be dropped
too.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

arch/arm/Kconfig.debug

@@ -70,11 +70,6 @@ config ARM_UNWIND
 	  the performance is not affected. Currently, this feature
 	  only works with EABI compilers. If unsure say Y.
 
-config OLD_MCOUNT
-	bool
-	depends on FUNCTION_TRACER && FRAME_POINTER
-	default y
-
 config DEBUG_USER
 	bool "Verbose user fault messages"
 	help