selftests: KVM: aarch64: Add the bitmap firmware registers to get-reg-list

Add the psuedo-firmware registers KVM_REG_ARM_STD_BMAP,
KVM_REG_ARM_STD_HYP_BMAP, and KVM_REG_ARM_VENDOR_HYP_BMAP to
the base_regs[] list.

Also, add the COPROC support for KVM_REG_ARM_FW_FEAT_BMAP.

Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220502233853.1233742-10-rananta@google.com