misc: Add Support for GPS via GPIO Control

Signed-off-by: AdiPat <adithemagnificent@gmail.com>
latona: fixup UART_SEL gpio

OMAP_GPIO_UART_SEL in Latona is used to dynamically switch UART
between the Application Processor (AP) and the Cellular Processor (CP).
The GPIO is pulled high if the AP reserves the UART or is pulled low
when the UART is reserved by the CP. We currently don't require the
Baseband logging and hence we pull up the GPIO and prevent the
modemctl from switching it.
latona:mux: enable muxing for PDA_ACTIVE
Commit a78de4851b7a54e856a4c568ca23dfc42ac49f95 fixes the issue with UART Selection.
Hence we re-enable the mux setting on PDA_ACTIVE.
This fixes the Radio upto some extent.