MLK-15343-1 ARM: imx: enable pcieb on imx8qm

Based on base board, enable pcieb lane1, enlarge
the CFG mapping space.
HSIO configuration is 1 lane PCIEA, 1 lane PCIEB and SATA.
PHY configurations:
PHY_X2_0 <------> PCIEA 1 lane
PHY_X2_1 <------> PCIEB 1 lane
PHY_X1 <------> SATA

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>