[ARM] 5227/1: Add the ENDPROC declarations to the .S files

This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
instructions in Thumb-2.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/lib/io-readsb.S

@@ -120,3 +120,4 @@ ENTRY(__raw_readsb)
 		strgtb	r3, [r1]
 
 		ldmfd	sp!, {r4 - r6, pc}
+ENDPROC(__raw_readsb)