refactor(neoverse-rd): unify GIC SPI range macros

The existing macros representing GIC SPI minimum and maximum for
multichip platforms lack a consistent naming convention. To address
this, establish the convention "NRD_CHIP<x>_SPI_MIN" and
"NRD_CHIP<x>_SPI_MAX" for use across all Neoverse Reference Design
multichip platforms.

Furthermore, extend this naming convention to RD-N2-Cfg2 and introduce
similar macros.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: Idca2a8c66579f05e712e3b6e95204fedc122cf23
6 files changed