Update MIPS -mvirt option description

gcc/
	PR target/80057
	* config/mips/mips.opt (-mvirt): Update description.
	* doc/invoke.texi (-mvirt): Likewise.

From-SVN: r246807

gcc/ChangeLog

+2017-03-31  Matthew Fortune  <matthew.fortune@imgtec.com>
+
+	PR target/80057
+	* config/mips/mips.opt (-mvirt): Update description.
+	* doc/invoke.texi (-mvirt): Likewise.
+
 2017-04-10  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/80362

gcc/config/mips/mips.opt

@@ -406,7 +406,7 @@ Put uninitialized constants in ROM (needs -membedded-data).
 
 mvirt
 Target Report Var(TARGET_VIRT)
-Use Virtualization Application Specific instructions.
+Use Virtualization (VZ) instructions.
 
 mxpa
 Target Report Var(TARGET_XPA)

gcc/doc/invoke.texi

@@ -19345,7 +19345,7 @@ Use (do not use) the MIPS Enhanced Virtual Addressing instructions.
 @itemx -mno-virt
 @opindex mvirt
 @opindex mno-virt
-Use (do not use) the MIPS Virtualization Application Specific instructions.
+Use (do not use) the MIPS Virtualization (VZ) instructions.
 
 @item -mxpa
 @itemx -mno-xpa