s390/vdso: Use SYM_DATA_START_LOCAL()/SYM_DATA_END() for data objects

Use SYM_DATA_START_LOCAL()/SYM_DATA_END() in vgetrandom-chacha.S so
that the constants end up in an object with correct size:

readelf -Ws vgetrandom-chacha.o
   Num:    Value          Size Type    Bind   Vis      Ndx Name
   ...
     5: 0000000000000000    32 OBJECT  LOCAL  DEFAULT    5 chacha20_constants
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

arch/s390/kernel/vdso64/vgetrandom-chacha.S

@@ -23,9 +23,10 @@
 	.section .rodata
 
 	.balign 32
-.Lconstants:
+SYM_DATA_START_LOCAL(chacha20_constants)
 	.long	0x61707865,0x3320646e,0x79622d32,0x6b206574 # endian-neutral
 	.long	0x03020100,0x07060504,0x0b0a0908,0x0f0e0d0c # byte swap
+SYM_DATA_END(chacha20_constants)
 
 	.text
 /*
@@ -40,7 +41,7 @@
  */
 SYM_FUNC_START(__arch_chacha20_blocks_nostack)
 	CFI_STARTPROC
-	larl	%r1,.Lconstants
+	larl	%r1,chacha20_constants
 
 	/* COPY0 = "expand 32-byte k" */
 	VL	COPY0,0,,%r1