fix(coverity): temporarily exclude Arm FPGA from Coverity analysis

Arm FPGA platform build is failing due to increased size of the BL31 binary
as a result of spectre-bhb mitigation, causing tf-coverity job to fail.
This patch temporarily excludes Arm FPGA platfom until the issue is resolved.

Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: Ic7696a1062d8e41fee7aabcb25565386fe622174
diff --git a/script/tf-coverity/tf-cov-make b/script/tf-coverity/tf-cov-make
index 9d88f63..82f2130 100755
--- a/script/tf-coverity/tf-cov-make
+++ b/script/tf-coverity/tf-cov-make
@@ -262,8 +262,8 @@
 #
 # Arm internal FPGA port
 #
-make PLAT=arm_fpga $(common_flags) \
-    FPGA_PRELOADED_DTB_BASE=0x88000000 PRELOADED_BL33_BASE=0x82080000 all
+#make PLAT=arm_fpga $(common_flags) \
+#    FPGA_PRELOADED_DTB_BASE=0x88000000 PRELOADED_BL33_BASE=0x82080000 all
 
 #
 # Total Compute platforms