powerpc/32: Remove remaining .stabs annotations

STABS debug format has been superseded long time ago by DWARF.

Remove the few remaining .stabs annotations from old 32 bits code.

Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Christophe Leroy <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/68932ec2[e-mail]

arch/powerpc/include/asm/ppc_asm.h

···
 n:
 
 #define _GLOBAL(n)	\
-	.stabs __stringify(n:F-1),N_FUN,0,0,n;\
 	.globl n;	\
 n:
 

arch/powerpc/kernel/head_book3s_32.S

···
 	mtspr	SPRN_DBAT##n##L,RB
 
 	__HEAD
-	.stabs	"arch/powerpc/kernel/",N_SO,0,0,0f
-	.stabs	"head_book3s_32.S",N_SO,0,0,0f
-0:
 _ENTRY(_stext);
 
 /*

arch/powerpc/lib/checksum_32.S

···
 	EX_TABLE(8 ## n ## 7b, fault);
 
 	.text
-	.stabs	"arch/powerpc/lib/",N_SO,0,0,0f
-	.stabs	"checksum_32.S",N_SO,0,0,0f
-0:
 
 CACHELINE_BYTES = L1_CACHE_BYTES
 LG_CACHELINE_BYTES = L1_CACHE_SHIFT

arch/powerpc/lib/copy_32.S

···
 	EX_TABLE(8 ## n ## 7b,9 ## n ## 1b)
 
 	.text
-	.stabs	"arch/powerpc/lib/",N_SO,0,0,0f
-	.stabs	"copy_32.S",N_SO,0,0,0f
-0:
 
 CACHELINE_BYTES = L1_CACHE_BYTES
 LG_CACHELINE_BYTES = L1_CACHE_SHIFT