sim: cris: drop custom "dynamic" test field

This tag is used to force tests to be built dynamically (i.e. without
-static linking).  This is because cris-sim.exp in dejagnu turns on
static linking in ldflags.

The default configs and runtest flags shouldn't load these boards.
If these settings are still needed, we should figure out a different
way of suppressing the stock settings wholesale.  We want these to
all pass out of the box with little to no configuration so that they
can run in a multitarget build.

With dropping "dynamic", it'll be easier to merge the custom cris
test logic with the common sim test logic.

sim/testsuite/cris/c/badldso1.c

@@ -1,6 +1,5 @@
 /*
 #notarget: cris*-*-elf
-#dynamic:
 #xerror:
 #output: *: could not load ELF interpreter `*' for program `*'\n
  */

sim/testsuite/cris/c/badldso2.c

@@ -1,6 +1,5 @@
 /*
 #notarget: cris*-*-elf
-#dynamic:
 #xerror:
 #cc: additional_flags=-Wl,-dynamic-linker,/dev/null
 #output: *: could not load ELF interpreter `*' for program `*'\n

sim/testsuite/cris/c/badldso3.c

@@ -1,6 +1,5 @@
 /*
 #notarget: cris*-*-elf
-#dynamic:
 #xerror:
 #cc: additional_flags=-Wl,-dynamic-linker,/compilercheck.x
 #sim: --sysroot=@exedir@

sim/testsuite/cris/c/c.exp

@@ -105,7 +105,6 @@ foreach src [lsort [glob -nocomplain $srcdir/$subdir/*.c]] {
     set opts(xfail) ""
     set opts(target) ""
     set opts(notarget) ""
-    set opts(dynamic) ""
 
     # Clear any machine specific options specified in a previous test case
     if [info exists opts(sim,$mach)] {
@@ -142,16 +141,6 @@ foreach src [lsort [glob -nocomplain $srcdir/$subdir/*.c]] {
 	    }
 	}
 
-	if { $opt_name == "dynamic" \
-		 && [info exists board_info([target_info name],ldflags)] } {
-	    # Weed out -static from ldflags, but keep the original in
-	    # $orig_ldflags.
-	    set orig_ldflags $board_info([target_info name],ldflags)
-	    set ldflags " $orig_ldflags "
-	    regsub -all " -static " $ldflags " " ldflags
-	    set board_info([target_info name],ldflags) $ldflags
-	}
-
 	foreach m $opt_machs {
 	    set opts($opt_name,$m) $opt_val
 	}

sim/testsuite/cris/c/hellodyn.c

@@ -1,5 +1,4 @@
 /*
-#dynamic:
 #sim: --sysroot=@exedir@
  */
 #include "hello.c"

sim/testsuite/cris/c/hellodyn2.c

@@ -1,5 +1,4 @@
 /*
-#dynamic:
 #sim: --sysroot=@exedir@ --load-vma
  */
 #include "hello.c"

sim/testsuite/cris/c/hellodyn3.c

@@ -3,7 +3,6 @@
    ld.so.cache (having no absolute path specified for the executable
    falls back on loading through the same mechanisms as a DSO).
 #notarget: *-*-elf
-#dynamic:
 #sim: --sysroot=@exedir@ @exedir@/lib/ld.so.1 --library-path /
  */
 #include "hello.c"