Integrate meta-seco-rk/u-boot-seco_2017_09_next/ap/e09-typos
requested to merge integrate/meta-seco-rk/u-boot-seco_2017_09_next/ap/e09-typos/into/kirkstone into kirkstone
Integrate u-boot-seco-rk/ap/e09-typos
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[E09] fix typos
Fix typos in variables name: ENV_SYS_MMC_BOOTSCRIPT_PART, ENV_SYS_MMC_BOOTENV_PART