target/ppc: fix msgsync insns flags

This instruction was added by Power ISA 3.0, using PPC2_PRCNTL makes it
available for older processors, like de e5500 and e6500.

Fixes: 7af1e7b ("target/ppc: add support for hypervisor doorbells on book3s CPUs")
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20221006200654.725390-3-matheus.ferst@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

target/ppc/translate.c

@@ -6906,7 +6906,7 @@ GEN_HANDLER2_E(msgsnd, "msgsnd", 0x1F, 0x0E, 0x06, 0x03ff0001,
 GEN_HANDLER2_E(msgclr, "msgclr", 0x1F, 0x0E, 0x07, 0x03ff0001,
                PPC_NONE, (PPC2_PRCNTL | PPC2_ISA207S)),
 GEN_HANDLER2_E(msgsync, "msgsync", 0x1F, 0x16, 0x1B, 0x00000000,
-               PPC_NONE, PPC2_PRCNTL),
+               PPC_NONE, PPC2_ISA300),
 GEN_HANDLER(wrtee, 0x1F, 0x03, 0x04, 0x000FFC01, PPC_WRTEE),
 GEN_HANDLER(wrteei, 0x1F, 0x03, 0x05, 0x000E7C01, PPC_WRTEE),
 GEN_HANDLER(dlmzb, 0x1F, 0x0E, 0x02, 0x00000000, PPC_440_SPEC),