fs_mgr_verity: fix androidboot.veritymode=enforcing doesn't work

Should set verity mode to VERITY_MODE_DEFAULT when
androidboot.veritymode=enforcing.

Bug: 38103331
Test: `adb shell getprop partition.system.verified` returns 2 when veritymode=enforcing
Test: `adb shell getprop partition.vendor.verified` returns 2 when veritymode=enforcing

(cherry picked from commit 77cbfd6341a7a500fdb8e2f3cc4a4f721254f10e)

Merged-Id: I2f34eb6509f91989ce726e540cf2c0d353347ede
Change-Id: I2f34eb6509f91989ce726e540cf2c0d353347ede
diff --git a/fs_mgr/fs_mgr_verity.cpp b/fs_mgr/fs_mgr_verity.cpp
index 0bf173b..5fa10bc 100644
--- a/fs_mgr/fs_mgr_verity.cpp
+++ b/fs_mgr/fs_mgr_verity.cpp
@@ -663,7 +663,7 @@
     /* use the kernel parameter if set */
     std::string veritymode;
     if (fs_mgr_get_boot_config("veritymode", &veritymode)) {
-        if (veritymode.compare("enforcing")) {
+        if (veritymode == "enforcing") {
             *mode = VERITY_MODE_DEFAULT;
         }
         return 0;