Fix another couple of arch define things

Core/MIPS/JitCommon/JitState.cpp

@@ -51,7 +51,7 @@ namespace MIPSComp {
 		continueMaxInstructions = 300;
 
 		useStaticAlloc = false;
-#ifdef ARM64
+#if PPSSPP_ARCH(ARM64)
 		useStaticAlloc = true;
 #endif
 	}

GPU/Common/TextureDecoderNEON.cpp

@@ -30,7 +30,7 @@ u32 QuickTexHashNEON(const void *checkp, u32 size) {
 	__builtin_prefetch(checkp, 0, 0);
 
 	if (((intptr_t)checkp & 0xf) == 0 && (size & 0x3f) == 0) {
-#if defined(IOS) || defined(ARM64)
+#if defined(IOS) || PPSSPP_ARCH(ARM64)
 		uint32x4_t cursor = vdupq_n_u32(0);
 		uint16x8_t cursor2 = vld1q_u16(QuickTexHashInitial);
 		uint16x8_t update = vdupq_n_u16(0x2455U);