pinctrl: renesas: r8a779f0: Fix tsn1_avtp_pps pin group

Correct a typo mistake in the definition of the tsn1_avtp_pps pin group
mux.

Signed-off-by: Phong Hoang <phong.hoang.wz@renesas.com>
Fixes: babe298e ("pinctrl: renesas: r8a779f0: Add Ethernet pins, groups, and functions")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/45ea6e87b91c36fd0b9706cf58ff50a4d1a99c44.1674825039.git.geert+renesas@glider.be