pinctrl: renesas: Rename RZ/A1 R7S72100 PFC tables to RZ/A1

Rename pfc-r7s72100.c to pfc-rza1.c to match the file name with Linux.
Rename the Kconfig symbol to match.

No functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
3 files changed