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) \
     ^