tpm: Rename tpm2_is_active_pcr()

This function is checking for active PCR banks, so rename it
to something that's easier to read and closer to what the function
does.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/tpm_tcg2.c b/lib/tpm_tcg2.c
index 7f868cc..edbe5f3 100644
--- a/lib/tpm_tcg2.c
+++ b/lib/tpm_tcg2.c
@@ -43,7 +43,7 @@
 
 		if (hash_mask) {
 			*supported_pcr |= hash_mask;
-			if (tpm2_is_active_pcr(&pcrs.selection[i]))
+			if (tpm2_is_active_bank(&pcrs.selection[i]))
 				*active_pcr |= hash_mask;
 		} else {
 			printf("%s: unknown algorithm %x\n", __func__,