KVM: selftests: fix minor typo in cpumodel_subfuncs

Specifically, fix spelling of "available" in main function.

Signed-off-by: Gopi Krishna Menon <krishnagopi487@gmail.com>
Link: https://lore.kernel.org/r/20250813154751.5725-1-krishnagopi487@gmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: gopi487krishna

tools/testing/selftests/kvm/s390/cpumodel_subfuncs_test.c

@@ -291,7 +291,7 @@ int main(int argc, char *argv[])
 			ksft_test_result_pass("%s\n", testlist[idx].subfunc_name);
 			free(array);
 		} else {
-			ksft_test_result_skip("%s feature is not avaialable\n",
+			ksft_test_result_skip("%s feature is not available\n",
 					      testlist[idx].subfunc_name);
 		}
 	}