feat(ls1046a): add new SoC platform ls1046a

The LS1046A is a cost-effective, power-efficient, and highly
integrated system-on-chip (SoC) design that extends the reach
of the NXP value-performance line of QorIQ communications
processors. Featuring power-efficient 64-bit Arm Cortex A72
cores with ECC-protected L1 and L2 cache memories for high
reliability, running up to 1.8 GHz.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Signed-off-by: rocket <rod.dorris@nxp.com>
Signed-off-by: Biwen Li <biwen.li@nxp.com>
Change-Id: I208d9bf1702410463c2b2630d31d0cd4eb7e8837