s390/bug: make use of asm_inline

This is the s390 version of commit 32ee8230b2b0 ("x86: bug.h: use
asm_inline in _BUG_FLAGS definitions").

See commit eb111869301e ("compiler-types.h: add asm_inline
definition") for more details.

Just like on x86 the .text section size decreases a bit while the
.data section size increases about the same amount (gcc 9.2 with
defconfig).

Signed-off-by: Heiko Carstens <[e-mail]>
Signed-off-by: Vasily Gorbik <[e-mail]>

arch/s390/include/asm/bug.h

···
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 
 #define __EMIT_BUG(x) do {					\
-	asm volatile(						\
+	asm_inline volatile(					\
 		"0:	j	0b+2\n"				\
 		"1:\n"						\
 		".section .rodata.str,\"aMS\",@progbits,1\n"	\
···
 #else /* CONFIG_DEBUG_BUGVERBOSE */
 
 #define __EMIT_BUG(x) do {					\
-	asm volatile(						\
+	asm_inline volatile(					\
 		"0:	j	0b+2\n"				\
 		"1:\n"						\
 		".section __bug_table,\"awM\",@progbits,%1\n"	\