Clarify that the shared variables of the shell protocols are properly named.

Clarify that the shared variables of the shell protocols are properly named.

This removes the non-shared gEfiShellProtocol and gEfiShellParametersProtocol and renames the shared version to those names.

This removes the m-versions of those protocol pointers.

signed-off-by: jcarsey
reviewed-by: darylm503

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11900 6f19259b-4bc3-4df7-8a09-765794883524