include: sframe: add SFRAME_V2_ prefixed macro names for FDE

include: sframe: add SFRAME_V2_ prefixed macro names for FDE

Such a change for readability only.  SFrame V1 is now obsolete, and with
newer versions like V3 or later, its likely better to have macro names
reflect the applicable version.

Add new macro names for FDE information related macros.

Reviewed-by: Jens Remus <jremus@linux.ibm.com>
include/
	* sframe.h (SFRAME_V2_FUNC_INFO): New definition.
	(SFRAME_V2_FUNC_FRE_TYPE): Likewise.
	(SFRAME_V2_FUNC_PC_TYPE): Likewise.
	(SFRAME_V2_FUNC_PAUTH_KEY): Likewise.
	(SFRAME_V2_FUNC_INFO_UPDATE_PAUTH_KEY): Likewise.