io/iommu/amd: Derive cpu page table level from va bits of /proc/cpuinfo

Instead of canceling the test if kernel config file is not found, rely and
derive cpu page table level from /proc/cpuinfo.

Signed-off-by: Dheeraj Kumar Srivastava <dheerajkumar.srivastava@amd.com>

Author: dhsrivas

io/iommu/amd/iommu_v2pgmode_test.py

@@ -104,7 +104,8 @@ def check_kernelconf_5lvl(self):
         if os.path.exists(config_file):
             return check_kernelconf(config_file, "CONFIG_X86_5LEVEL")
 
-        self.cancel("Kernel config not found in '/boot/' and '/lib/modules/<uname -r>/build/'")
+        self.log.info("Kernel config not found in '/boot/' and '/lib/modules/<uname -r>/build/'."
+                      "Using VA bits in /proc/cpuinfo to derive cpu page table level")
         return False
 
     def test(self):