mips/kvm: Fix Big endian 32-bit register access

mips/kvm: Fix Big endian 32-bit register access

Fix access to 32-bit registers on big endian targets. The pointer passed
to the kernel must be for the actual 32-bit value, not a temporary
64-bit value, otherwise on big endian systems the kernel will only
interpret the upper half.

Signed-off-by: James Hogan <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Leon Alrae <[email protected]>
Cc: Aurelien Jarno <[email protected]>
Cc: [email protected]
Cc: [email protected]
Message-Id: <1429871214[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>