KVM: selftests: fix minor typo in cpumodel_subfuncs

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

Signed-off-by: Gopi Krishna Menon <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Sean Christopherson <[e-mail]>

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

···
 			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);
 		}
 	}