Update features: 1. Add support RV1126B. 2. Limit max of lp4(x)_f1_freq_mhz of RV1126B to 400. Change-Id: Ic4c08abbb2106ee25aa292d65133bfb97ec8c0c4 Signed-off-by: Wesley Yao <wesley.yao@rock-chips.com>