Rename from apm_bioscall.s to apm_bioscall.S for removing a special rule

to build a module.  A repo-copy is not done because it has no important logs.

Pointed out by: ru

sys/conf/files.pc98

@@ -346,7 +346,7 @@ libkern/qdivrem.c		standard
 libkern/ucmpdi2.c		standard
 libkern/udivdi3.c		standard
 libkern/umoddi3.c		standard
-pc98/apm/apm_bioscall.s		optional apm
+pc98/apm/apm_bioscall.S		optional apm
 pc98/i386/busio.s		standard
 pc98/i386/busiosubr.c		standard
 pc98/i386/machdep.c		standard

sys/modules/apm/Makefile

@@ -8,16 +8,11 @@
 KMOD=	apm
 SRCS=	apm.c apm.h
 .if ${MACHINE} == "pc98"
-SRCS+=	apm_bioscall.s
+SRCS+=	apm_bioscall.S
 .endif
 SRCS+=	device_if.h bus_if.h
 
 EXPORT_SYMS=	apm_display	\
 		apm_softc
 
-.if ${MACHINE} == "pc98"
-apm_bioscall.o: apm_bioscall.s
-	${CC} -x assembler-with-cpp -DLOCORE ${CFLAGS} -c ${.IMPSRC}
-.endif
-
 .include <bsd.kmod.mk>