manifest: Update hal_microchip for new MEC5 HAL

Microchip external HAL repository has been updated with
the MEC5 HAL for new chips. MEC5 is a full HAL with chip
headers, C peripheral code, and PINCTRL DTSI files. MEC5
is meant for MEC174x, MEC175x, and also include support
for the older MEC172x named as MECH172x. NOTE: legacy
MEC172x in the currest zephyr tree is not affected.

Signed-off-by: Scott Worley <scott.worley@microchip.com>