[uart/dv] Update coverage exclusion file as design change
diff --git a/hw/ip/uart/dv/cov/uart_cov_excl.el b/hw/ip/uart/dv/cov/uart_cov_excl.el
index cc49164..1de13ae 100644
--- a/hw/ip/uart/dv/cov/uart_cov_excl.el
+++ b/hw/ip/uart/dv/cov/uart_cov_excl.el
@@ -3,16 +3,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 // Coverage exclusion file for uart
-CHECKSUM: "1115183444 4229339"
+ANNOTATION: "[UNR] default branch"
+CHECKSUM: "2856317324 3065048585"
 INSTANCE: tb.dut.uart_core
-// this is unreachable condition
-Condition 16 "7100374" "(break_err && (break_st == BRK_CHK)) 1 -1" (2 "10")
-CHECKSUM: "1115183444 3548154843"
-INSTANCE: tb.dut.uart_core
-// these are scanmode ralated branches
-Branch 1 "2534752149" "scanmode_i" (0) "scanmode_i 1"
-Branch 5 "2534752149" "scanmode_i" (0) "scanmode_i 1"
-Branch 1 "2534752149" "scanmode_i" (1) "scanmode_i 0"
-Branch 5 "2534752149" "scanmode_i" (1) "scanmode_i 0"
-// default branch, it's unreachable
-Branch 9 "221332935" "(!rst_ni)" (5) "(!rst_ni) 0,default,-,-"
+Branch 7 "2483258407" "(!rst_ni)" (5) "(!rst_ni) 0,default,-,-"