ARC: Reset: Use __builtin_arc_brk() instead of open-coded ASM

For quite some time we have a GCC's built-in which inserts BRK
instruction so let's use it instead of simple insertion of in-line
assembly.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/arch/arc/lib/reset.c b/arch/arc/lib/reset.c
index 40fb0f1..fe38c51 100644
--- a/arch/arc/lib/reset.c
+++ b/arch/arc/lib/reset.c
@@ -12,7 +12,7 @@
 
 #ifdef DEBUG
 	/* Stop debug session here */
-	__asm__("brk");
+	__builtin_arc_brk();
 #endif
 	return 0;
 }