linux-ls1: update to sdk v1.7 release

      This includes following changes:

      bdb722f arm: dts: ls1021a-twr: remove dspi1 node for cannot be verified
      fb3f709 arm: ls1: only call ls1_pm_iomap() when doing deep sleep
      c15b78f ls1021a/dts: Add eTSEC1 as wake-up event source
      5f94f9f qspi: ls102xa: Adjust the size of QSPI AMBA Bus memory map

Signed-off-by: Chunrong Guo <B40290@freescale.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
libfslcodec: Use PACKAGECONFIG to handle VPU support

This allow the set of VPU support, depending on the SoC family, in a
more clean way and also avoiding the 'imx-vpu' dependency accordingly.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>