MIPS: Clean up RDHWR handling
No preprocessor definitions are used in the handling of the registers accessible with the RDHWR instruction, nor the corresponding bits in the CP0 HWREna register. Add definitions for both the register numbers (MIPS_HWR_*) and HWREna bits (MIPS_HWRENA_*) in asm/mipsregs.h and make use of them in the initialisation of HWREna and emulation of the RDHWR instruction. Signed-off-by: James Hogan <james.hogan@imgtec.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: David Daney <david.daney@cavium.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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