+=0D
+ PinFunction (Exclusive, PullDown, BCM_ALT3, "\\_SB.GDV0.GPI0", 0, Reso=
urceConsumer, , ) { 32, 33 }=0D
+=0D
+ // fake the CTS signal as we don't support HW flow control yet=0D
+ // BCM_ALT2 is set as output (low) by default=0D
+ PinFunction (Exclusive, PullNone, BCM_ALT2, "\\_SB.GDV0.GPI0", 0, Reso=
urceConsumer, , ) { 31 }=0D
})=0D

I think it's better to do the pin muxing in ConfigDxe, depending on which UART is free to be used for Bluetooth.