drivers: pinmux: stm32f7: CAN, SPI, I2C pinmuxes added

All pinmux supporting CAN, SPI and I2C of F7 series are added.
Since the F7 series supports up to two CANs,
the pin names of CANs have been changed.

Several minor pinmux errors have also been fixed.
Sorted by Alternate function.

Signed-off-by: Kwon Tae-young <tykwon@m2i.co.kr>