ti: j722s: Fix reg length in pinctrl as per TRM description

In j722s_main.dtsi, the pinctrl block must have reg length 0x2b0
As per TRM, PADCONFIG registers range from 0 to 171.
Thus, length = (171-0+1)*4 = 172*4 = 0x2b0.

Reference: https://www.ti.com/lit/ds/symlink/tda4ven-q1.pdf


Table 5.1 contains data on PADCONFIG registers.

Signed-off-by: Shreyas Shankar <s-shankar@ti.com>