STM32: AdvancedTimer: Changed to mode/output combined uint.

The "mode/output" uint contains four bits
that describe the intended output setting:
Bit0: Output Enabled/Disabled
Bit1: Output Polarity
Bit2: Complementary Output Enable/Disable
Bit3: Complementary Output Polarity

As well as Mode Information (Bit6-Bit4)
which is just an OutputCompareMode constant ored with the
port output quadruple specified above.