tc32/Make.defs: fix build break after merge unblock/block_task

Signed-off-by: wangbowen6 <wangbowen6@xiaomi.com>

arch/arm/src/tlsr82/tc32/Make.defs

@@ -36,7 +36,7 @@ CMN_ASRCS :=
 # Filter-out unnecessary .c files
 
 TC32_CSRCS_FILTER := arm_backtrace_fp.c arm_backtrace_thumb.c
-TC32_CSRCS_FILTER += arm_switchcontext.c arm_fullcontextrestore.c
+TC32_CSRCS_FILTER += arm_fullcontextrestore.c
 TC32_CSRCS_FILTER += arm_saveusercontext.c arm_udelay.c
 CMN_CSRCS := $(filter-out $(TC32_CSRCS_FILTER), $(CMN_CSRCS))
 

arch/arm/src/tlsr82/tc32/tc32_backtrace.c

@@ -229,6 +229,8 @@ static void *backtrace_push_internal(void **psp, void **ppc)
                 break;
               }
 
+            /* Pass through */
+
           case 1:
             if (INSTR_IS(ins16, T_PUSH_LO))
               {