lpc43xx: remove the fpu settings in startup_LPC43xx_M0

bsp/lpc43xx/Libraries/Device/NXP/LPC43xx/Source/Templates/GCC/startup_LPC43xx_M0.s

@@ -6,7 +6,7 @@
 
 	.syntax unified
 	.cpu cortex-m0
-	.fpu softvfp
+	.arch armv6-m
 	.thumb
 
 	.word  _sidata