[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-writesb.S

@@ -91,3 +91,4 @@ ENTRY(__raw_writesb)
 		strgtb	r3, [r0]
 
 		ldmfd	sp!, {r4, r5, pc}
+ENDPROC(__raw_writesb)