SX1268 supports a "setRxBoostedGainMode" mode - this should be configurable or enabled by default

[Holger Adams]

Is your feature request related to a problem? Please describe.

SX1268 supports an 'setRxBoostedGainMode' mode which should be available as an option to activate it.

Describe the solution you'd like
int16_t setRxBoostedGainMode(bool rxbgm, bool persist = true)

rxbgm – True for Rx Boosted Gain, false for Rx Power Saving Gain

Enables or disables Rx Boosted Gain mode as described in SX126x datasheet section 9.6 (SX1261/2 v2.1, SX1268 v1.1)