BaseTools: Update FMP Capsule support to follow FDF spec
BaseTools: Update FMP Capsule support to follow FDF spec

Current the FMP Capsule feature is supported, but its format has a little
different with FDF spec. so this patch 1) Align the FMP Capsule with FDF
spec. 2) fix some style issue, eg: Tab. 3) Add a SectionParser function to
check the section header info since this method is used in 7 places.

Cc: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Yonghong Zhu <78d981fe33a016071af5222c56d5cf77f30fb0b2@intel.com>
Reviewed-by: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>

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