ARM: rpc: autoselect CPU_SA110

ARCH_RPC no longer supports other CPUs aside from StrongARM110,
so we can make the option implicitly selected by the platform
and no longer give the option of building a kernel without CPU
support.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>

arch/arm/Kconfig

@@ -698,6 +698,7 @@ config ARCH_RPC
 	select ARCH_MAY_HAVE_PC_FDC
 	select ARCH_SPARSEMEM_ENABLE
 	select ARCH_USES_GETTIMEOFFSET
+	select CPU_SA110
 	select FIQ
 	select HAVE_IDE
 	select HAVE_PATA_PLATFORM

arch/arm/mm/Kconfig

@@ -264,7 +264,7 @@ config CPU_ARM1026
 
 # SA110
 config CPU_SA110
-	bool "Support StrongARM(R) SA-110 processor" if ARCH_RPC
+	bool
 	select CPU_32v3 if ARCH_RPC
 	select CPU_32v4 if !ARCH_RPC
 	select CPU_ABRT_EV4