ADD: GNSS Driver for U-BLOX M10 & Support for UBX Messages

MODEM_UBX: Adds Support for UBX Messages in Modem Subsystem.

GNSS API Supported: get_supported_systems, set_fix_rate, get_fix_rate,
	set_enabled_systems, get_enabled_systems, set_navigation_mode,
	get_navigation_mode.

Boards Tested: MIMXRT1062_FMURT6, VMU_RT1170.

Note: Partial support for U-BLOX Messages is provided as of now.

Signed-off-by: Sumit Batra <sumit.batra@nxp.com>
Signed-off-by: Mayank Mahajan <mayankmahajan.x@nxp.com>