target-ppc: Altivec 2.07: Update AVR Structure

This patch updates the ppc_avr_t data structure to include elements for
signed 64-bit integers and (conditionally) unsigned 128 bit integers.
These elements will be in instructions models later on in this patch series.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

target-ppc/cpu.h

@@ -352,6 +352,10 @@ union ppc_avr_t {
     int16_t s16[8];
     int32_t s32[4];
     uint64_t u64[2];
+    int64_t s64[2];
+#ifdef CONFIG_INT128
+    __uint128_t u128;
+#endif
 };
 
 #if !defined(CONFIG_USER_ONLY)