fixdep: handle CONFIG_IS_ENABLE() and friends for TPL

Since commit f1c6e1922eb5 ("spl: dm: use CONFIG_IS_ENABLED to test for
the DM option"), CONFIG_IS_ENABLED() handles CONFIG_TPL_* options, but
fixdep still cannot because it hard-codes the "SPL_" prefix as follows:

    char tmp_buf[256] = "SPL_"; /* hack for U-Boot */

Take care of the "TPL_" prefix too.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index c9277d7..555dada 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -103,7 +103,7 @@
 #include <stdio.h>
 #include <ctype.h>
 
-int is_spl_build = 0; /* hack for U-Boot */
+char tmp_buf[256]; /* hack for U-Boot */
 
 static void usage(void)
 {
@@ -230,7 +230,6 @@
 {
 	const char *q, *r;
 	const char *start = p;
-	char tmp_buf[256] = "SPL_"; /* hack for U-Boot */
 
 	while ((p = strstr(p, "CONFIG_"))) {
 		if (p > start && (isalnum(p[-1]) || p[-1] == '_')) {
@@ -260,7 +259,7 @@
 			while (isalnum(*q) || *q == '_')
 				q++;
 			r = q;
-			if (r > p && is_spl_build) {
+			if (r > p && tmp_buf[0]) {
 				memcpy(tmp_buf + 4, p, r - p);
 				r = tmp_buf + 4 + (r - p);
 				p = tmp_buf;
@@ -419,8 +418,11 @@
 	cmdline = argv[3];
 
 	/* hack for U-Boot */
-	if (!strncmp(target, "spl/", 4) || !strncmp(target, "tpl/", 4))
-		is_spl_build = 1;
+	if (!strncmp(target, "spl/", 4))
+		strcpy(tmp_buf, "SPL_");
+	else if (!strncmp(target, "tpl/", 4))
+		strcpy(tmp_buf, "TPL_");
+	/* end U-Boot hack */
 
 	printf("cmd_%s := %s\n\n", target, cmdline);