KVM: PPC: Book3S: Add MMIO emulation for FP and VSX instructions

This patch provides the MMIO load/store emulation for instructions
of 'double & vector unsigned char & vector signed char & vector
unsigned short & vector signed short & vector unsigned int & vector
signed int & vector double '.

The instructions that this adds emulation for are:

- ldx, ldux, lwax,
- lfs, lfsx, lfsu, lfsux, lfd, lfdx, lfdu, lfdux,
- stfs, stfsx, stfsu, stfsux, stfd, stfdx, stfdu, stfdux, stfiwx,
- lxsdx, lxsspx, lxsiwax, lxsiwzx, lxvd2x, lxvw4x, lxvdsx,
- stxsdx, stxsspx, stxsiwx, stxvd2x, stxvw4x

[paulus@ozlabs.org - some cleanups, fixes and rework, make it
 compile for Book E, fix build when PR KVM is built in]

Signed-off-by: Bin Lu <lblulb@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arch/powerpc/include/asm/disassemble.h

@@ -87,6 +87,11 @@ static inline unsigned int get_oc(u32 inst)
 	return (inst >> 11) & 0x7fff;
 }
 
+static inline unsigned int get_tx_or_sx(u32 inst)
+{
+	return (inst) & 0x1;
+}
+
 #define IS_XFORM(inst)	(get_op(inst)  == 31)
 #define IS_DSFORM(inst)	(get_op(inst) >= 56)