MdeModulePkg ScsiDiskDxe: Fix hang issue when reconnecting an ISCSI device
MdeModulePkg ScsiDiskDxe: Fix hang issue when reconnecting an ISCSI device

The 'Reset' function for BlockIO(2) in ScsiDiskDxe should return
EFI_SUCCESS instead of EFI_DEVICE_ERROR when a device does not support
reset feature.

Otherwise, a 'reconnect -r' action when an ISCSI device is attached will
cause system hang.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <f387b71200577e27ccf5abb090fda0ddd187ec6e@intel.com>
Reviewed-by: Feng Tian <e66bb7e9f36c82a029035c5885acf75500d07e68@intel.com>

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