power: pmic: tps65941: Update compatible to aling with kernel DT

Linux kernel driver drivers/mfd/tps6594-i2c.c is using different
name for compatible for tps6594 family PMIC.
After sync of Linux kernel DT to u-boot for TI platforms
J7200, J721S2 and J784S4 PMIC is no longer getting probed.

So updating compatible field to align with Linux driver and DT.

Signed-off-by: Udit Kumar <u-kumar1@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>