ARM: pm: plat-s3c24xx: cleanup s3c_cpu_save

s3c_cpu_save does not need to save any registers with the new
cpu_suspend calling convention.  Remove these redundant instructions.
Tested-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/plat-s3c24xx/sleep.S

@@ -48,10 +48,8 @@
 	*/
 
 ENTRY(s3c_cpu_save)
-	stmfd	sp!, { r4 - r12, lr }
 	adr	r3, BSYM(s3c24xx_finish_suspend)
-	bl	cpu_suspend
-	ldmfd	sp!, { r4 - r12, pc }
+	b	cpu_suspend
 
 s3c24xx_finish_suspend:
 	@@ jump to final code to send system to sleep