Revert "staging: fsl-mc: be consistent when checking strcmp() return"

The previous fix removed the equal to zero comparisons by the strcmps and
now the function always returns true. Revert this change to restore the
original correctly functioning code.

Detected by CoverityScan, CID#1452267 ("Constant expression result")

This reverts commit b93ad9a067e1515af42da7d56bc61f1a25075f94.

Fixes: b93ad9a067e1 ("staging: fsl-mc: be consistent when checking strcmp() return")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-mc/bus/fsl-mc-allocator.c

@@ -16,9 +16,9 @@
 
 static bool __must_check fsl_mc_is_allocatable(const char *obj_type)
 {
-	return strcmp(obj_type, "dpbp") ||
-	       strcmp(obj_type, "dpmcp") ||
-	       strcmp(obj_type, "dpcon");
+	return strcmp(obj_type, "dpbp") == 0 ||
+	       strcmp(obj_type, "dpmcp") == 0 ||
+	       strcmp(obj_type, "dpcon") == 0;
 }
 
 /**