pinctrl: renesas: r8a779g0: Fix alignment in GPSR[678]_* macros

The alignment of the second column in the definitions of the GPSR[678]_*
macros does not match the alignment used in other definitions.
Fix this to improve uniformity.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/9424a0e7f6d66a94d333df9fdc5cdf3b7defb8f5.1669036423.git.geert+renesas@glider.be