configure.ac: Move radv check to the Vulkan section

This moves the LLVM check for radv to the corresponding driver section.
No functional change.

Signed-off-by: Tobias Droste <tdroste@gmx.de>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/configure.ac b/configure.ac
index 22fcc21..07326e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1858,6 +1858,7 @@
             ;;
         xradeon)
             PKG_CHECK_MODULES([AMDGPU], [libdrm_amdgpu >= $LIBDRM_AMDGPU_REQUIRED])
+            radeon_llvm_check "radv" "3" "9" "0"
             HAVE_RADEON_VULKAN=yes;
             if test "x$with_sha1" == "x"; then
                 AC_MSG_ERROR([radv vulkan driver requires SHA1])
@@ -2507,10 +2508,6 @@
     done
 fi
 
-if test "x$HAVE_RADEON_VULKAN" = "xyes"; then
-    radeon_llvm_check "radv" "3" "9" "0"
-fi
-
 dnl Set LLVM_LIBS - This is done after the driver configuration so
 dnl that drivers can add additional components to LLVM_COMPONENTS.
 dnl Previously, gallium drivers were updating LLVM_LIBS directly