[S390] sparse: fix sparse warnings in math-emu

Fix three sparse warnings in math-emu / sysinfo:

arch/s390/kernel/sysinfo.c:448:17: error: return expression in void function
arch/s390/kernel/sysinfo.c:445:25: warning: shift too big (32) for type unsigned int
arch/s390/kernel/sysinfo.c:445:25: warning: shift too big (32) for type unsigned int

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index 5c9e439..2a94b77 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -442,7 +442,7 @@
 		 */
 		FP_UNPACK_SP(SA, &fmil);
 		if ((info->capability >> 23) == 0)
-			FP_FROM_INT_S(SB, info->capability, 32, int);
+			FP_FROM_INT_S(SB, (long) info->capability, 64, long);
 		else
 			FP_UNPACK_SP(SB, &info->capability);
 		FP_DIV_S(SR, SA, SB);