cmd: bcb: change strcmp() usage style in the do_bcb_ab_select()

In the entire cmd/bcb.c file, the return value of strcmp() is not
directly compared to 0. Therefore, it would be better to maintain this
style in the new do_bcb_ab_select() function as well.

Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Guillaume La Roque <glaroque@baylibre.com>
Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Tested-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> # vim3_android
Link: https://lore.kernel.org/r/20241017-android_ab_master-v5-4-43bfcc096d95@salutedevices.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/cmd/bcb.c b/cmd/bcb.c
index 2854408..b33c046 100644
--- a/cmd/bcb.c
+++ b/cmd/bcb.c
@@ -391,7 +391,7 @@
 		return CMD_RET_USAGE;
 
 	for (int i = 4; i < argc; i++) {
-		if (strcmp(argv[i], "--no-dec") == 0)
+		if (!strcmp(argv[i], "--no-dec"))
 			dec_tries = false;
 		else
 			return CMD_RET_USAGE;