target: move regmaps to armv7m.c

This move will enable use to share with regmaps with the stlink target.

Change-Id: If8f41c7c53323d5074cb22ec3440530c1e402004
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/377
Tested-by: jenkins
Reviewed-by: Øyvind Harboe <oyvindharboe@gmail.com>

src/target/armv7m.h

@@ -49,6 +49,8 @@ enum armv7m_mode
 };
 
 extern char *armv7m_mode_strings[];
+extern const int armv7m_psp_reg_map[];
+extern const int armv7m_msp_reg_map[];
 
 enum armv7m_regtype
 {