aarch64: shuffle ID_AA64PFR{0,1}_EL1 definitions

Usually the ID register definitions are sorted alphanumerically, but for
historical reasons the ID_AA64PFR0_* definitions are placed before the
ID_AA64PFR1_* definitions. Reorder these for consistency.

There should be no functional change as a result of this patch.

Link: https://lore.kernel.org/r/20250511095211.1638852-2-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>