arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps

arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps

Currently for each hwcap we define both the HWCAPn_NAME definition which is
exposed to userspace and a kernel internal KERNEL_HWCAP_NAME definition
which we use internally. This is tedious and repetitive, instead use a
script to generate the KERNEL_HWCAP_ definitions from the UAPI definitions.

No functional changes intended.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>