064d301fb0
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1185 SdMmcHcReset used to set all bits of Software Reset Register to 1 including reserved ones, which on some controllers may result in timeout. Now only first bit is set, which means "Software Reset for All". Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Marcin Wojtas <mw@semihalf.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com>