arm64: dts: ti: k3-am62p-j722s: fix pinctrl-single size

arm64: dts: ti: k3-am62p-j722s: fix pinctrl-single size

Pinmux registers ends at 0x000f42ac (including). Thus, the size argument
of the pinctrl-single node has to be 0x2b0. Fix it.

This will fix the following error:
pinctrl-single f4000.pinctrl: mux offset out of range: 0x2ac (0x2ac)

Fixes: 29075cc09f43 ("arm64: dts: ti: Introduce AM62P5 family of SoCs")
Signed-off-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20250618065239.1904953-1-mwalle@kernel.org
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>