emulators/mame: fix build on powerpc64*

Move ARM-specific patch to EXTRA_PATCHES to fix build:
../../../../../3rdparty/lzma/C/AesOpt.c:835:9: warning: AES  HW_SW stub was used [-W#pragma-messages]
        ^
../../../../../3rdparty/lzma/C/AesOpt.c:848:1: error: variable has incomplete type 'void'
AES_COMPAT_STUB (AesCbc_Encode)
^
../../../../../3rdparty/lzma/C/AesOpt.c:844:5: note: expanded from macro 'AES_COMPAT_STUB'
    AES_FUNC_START(name); \
    ^
../../../../../3rdparty/lzma/C/AesOpt.c:841:10: note: expanded from macro 'AES_FUNC_START'
    void MY_FAST_CALL name(UInt32 *p, Byte *data, size_t numBlocks) \
         ^

emulators/mame/Makefile

@@ -190,6 +190,10 @@ _TOOLS_MANUALS=		-name *.1 -depth 1 -type f -and -not -type d -and -not \
 MAKE_ENV+=	PTR64=1
 .endif
 
+.if ${ARCH} == aarch64 || ${ARCH} == armv7
+EXTRA_PATCHES+=	${PATCHDIR}/extra-patch-3rdparty_lzma_C_AesOpt.c
+.endif
+
 # Compiling with -pg (PROFILE) causes the linker to run out of memory on i386,
 # build with less profiling data:
 .if ${ARCH:Mi386}