ionic: Fix have_movdir64b() cpuid max-leaf query

use eax=0 to query the max supported leaf, not eax=7 which
executes leaf 7 directly and returns an unrelated value for
the support check.

Fixes: 6d82ac7ba ("ionic: Add ionic provider")
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>

providers/ionic/ionic_verbs.c

diff --git a/providers/ionic/ionic_verbs.c b/providers/ionic/ionic_verbs.c
index 5108a6f..b5abe74 100644
--- a/providers/ionic/ionic_verbs.c
+++ b/providers/ionic/ionic_verbs.c
@@ -42,7 +42,7 @@
 	/* Return highest supported cpuid input value.  */
 	__asm__ volatile ("cpuid\n\t"
 			  : "=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx)
-			  : "0" (leaf));
+			  : "0" (0));
 
 	if (ax == 0 || ax < leaf)
 		return 0;