Use the same name (lowlevel_init) for all (ARM) boards
diff --git a/cpu/at91rm9200/lowlevel.S b/cpu/at91rm9200/lowlevel.S
index c8af7a6..5521e5d 100644
--- a/cpu/at91rm9200/lowlevel.S
+++ b/cpu/at91rm9200/lowlevel.S
@@ -74,8 +74,8 @@
 	.word	TEXT_BASE
 #endif
 
-.globl lowlevelinit
-lowlevelinit:
+.globl lowlevel_init
+lowlevel_init:
 	/* Get the CKGR Base Address */
 	ldr     r1, =AT91C_BASE_CKGR
 	/* Main oscillator Enable register */