armv7 a4x dsb fix

[Artturi Alm]

Hi,

just the bug fix, so this diff leaves the unused relics around and so,
but better than current/nothing, and hopefully small enough to get looked at.

-Artturi


diff --git a/sys/arch/arm/armv7/armv7_a4x_io.S 
b/sys/arch/arm/armv7/armv7_a4x_io.S
index 3fa09faa4c2..5e9db421853 100644
--- a/sys/arch/arm/armv7/armv7_a4x_io.S
+++ b/sys/arch/arm/armv7/armv7_a4x_io.S
@@ -50,14 +50,17 @@
  */
 
 ENTRY(a4x_bs_r_1)
+       dsb     sy
        ldr     r0, [r1, r2, LSL #2]
        mov     pc, lr
 
 ENTRY(a4x_bs_r_2)
+       dsb     sy
        ldr     r0, [r1, r2, LSL #2]
        mov     pc, lr
 
 ENTRY(a4x_bs_r_4)
+       dsb     sy
        ldr     r0, [r1, r2, LSL #2]
        mov     pc, lr
 
@@ -67,14 +70,17 @@ ENTRY(a4x_bs_r_4)
 
 ENTRY(a4x_bs_w_1)
        str     r3, [r1, r2, LSL #2]
+       dsb     sy
        mov     pc, lr
 
 ENTRY(a4x_bs_w_2)
        str     r3, [r1, r2, LSL #2]
+       dsb     sy
        mov     pc, lr
 
 ENTRY(a4x_bs_w_4)
        str     r3, [r1, r2, LSL #2]
+       dsb     sy
        mov     pc, lr
 
 /*
@@ -82,11 +88,11 @@ ENTRY(a4x_bs_w_4)
  */
 ENTRY(a4x_bs_rm_1)
        mov r2, r2, LSL #2
-       b generic_bs_rm_1
+       b armv7_bs_rm_1
        
 ENTRY(a4x_bs_rm_2)
        mov r2, r2, LSL #2
-       b generic_armv4_bs_rm_2
+       b armv7_bs_rm_2
 
 
 
@@ -95,8 +101,8 @@ ENTRY(a4x_bs_rm_2)
  */
 ENTRY(a4x_bs_wm_1)
        mov r2, r2, LSL #2
-       b generic_bs_wm_1
+       b armv7_bs_wm_1
        
 ENTRY(a4x_bs_wm_2)
        mov r2, r2, LSL #2
-       b generic_armv4_bs_wm_2
+       b armv7_bs_wm_2