os-support/solaris: Drop ExtendedEnabled global variable

Keeping track of kernel state in user space doesn't buy us anything,
and introduces bugs, as we were keeping global state but the Solaris
kernel tracks IOPL per thread.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

hw/xfree86/os-support/solaris/sun_vid.c

@@ -73,22 +73,14 @@ xf86OSInitVidMem(VidMemInfoPtr pVidMem)
 /* I/O Permissions section						   */
 /***************************************************************************/
 
-#if defined(__i386__) || defined(__i386) || defined(__x86)
-static Bool ExtendedEnabled = FALSE;
-#endif
-
 Bool
 xf86EnableIO(void)
 {
 #if defined(__i386__) || defined(__i386) || defined(__x86)
-    if (ExtendedEnabled)
-        return TRUE;
-
     if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0) {
         xf86Msg(X_WARNING, "xf86EnableIOPorts: Failed to set IOPL for I/O\n");
         return FALSE;
     }
-    ExtendedEnabled = TRUE;
 #endif                          /* i386 */
     return TRUE;
 }
@@ -97,11 +89,6 @@ void
 xf86DisableIO(void)
 {
 #if defined(__i386__) || defined(__i386) || defined(__x86)
-    if (!ExtendedEnabled)
-        return;
-
     sysi86(SI86V86, V86SC_IOPL, 0);
-
-    ExtendedEnabled = FALSE;
 #endif                          /* i386 */
 }