tests/tcg/arc: remove {LD,ST}DL tests

Since the 128-bit memory instructions do not exist in the arcv2
architecture, delete the corresponding test files and Makefile lines.

Signed-off-by: Artemiy Volkov <[email protected]>

Author: artemiy-volkov

tests/tcg/arc/Makefile

@@ -90,8 +90,6 @@ TESTCASES += check_bi.tst
 TESTCASES += check_bih.tst
 # arc64
 #TESTCASES += check_swapl.tst
-#TESTCASES += check_lddl.tst
-#TESTCASES += check_stdl.tst
 
 all: $(TESTCASES)
 OBJECTS = ivt.o