Linker Script: fix a region issue that causes mdb fail to reset

Previously the linker script specify both lregion and vregion for .data
section, which would prevent mdb to reload the region during reset of
hsdk and emsdp (Because these boards use part of ram to store .text).

Signed-off-by: Yuguo Zou <yuguo.zou@synopsys.com>

board/linker_template_mw.ld

@@ -78,7 +78,7 @@ SECTIONS {
 			*(.tls*)
 			_e_data = .;
 		}
-	} > REGION_RAM AT > REGION_ROM
+	} > REGION_RAM
 
 	GROUP (NOLOAD) : {
 		.bss ALIGN(8): {