[ARM] 4416/1: NWFPE: fix undeclared symbols

Fix the undeclared symbols sparse is warning about.

arch/arm/nwfpe/softfloat.c:1727:7: warning: symbol 'float64_to_uint32' was not declared. Should it be static?
arch/arm/nwfpe/softfloat.c:1753:7: warning: symbol 'float64_to_uint32_round_to_zero' was not declared. Should it be static?
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/nwfpe/softfloat.h

@@ -273,4 +273,7 @@ static inline flag float64_lt_nocheck(float64 a, float64 b)
 extern flag float32_is_nan( float32 a );
 extern flag float64_is_nan( float64 a );
 
+extern int32 float64_to_uint32( struct roundingData *roundData, float64 a );
+extern int32 float64_to_uint32_round_to_zero( float64 a );
+
 #endif