arm64: compat: Move sigreturn32.S to .rodata section

Kuser code should be inside .rodata. sigreturn32.S is splited
from kuser32.S, the code in .text section is never executed.

Move it to .rodata.

Signed-off-by: Chen Zhongjin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>

Author: Chen Zhongjin

arch/arm64/kernel/sigreturn32.S

@@ -15,6 +15,7 @@
 
 #include <asm/unistd.h>
 
+	.section .rodata
 	.globl __aarch32_sigret_code_start
 __aarch32_sigret_code_start: