MIPS: math-emu: Make NaN classifiers static

The `ieee754sp_isnan' and `ieee754dp_isnan' NaN classifiers are now no
longer externally referred, remove their header prototypes and make them
local to the two only respective places still making use of them.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9693/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/math-emu/ieee754dp.c

@@ -30,7 +30,7 @@ int ieee754dp_class(union ieee754dp x)
 	return xc;
 }
 
-int ieee754dp_isnan(union ieee754dp x)
+static inline int ieee754dp_isnan(union ieee754dp x)
 {
 	return ieee754_class_nan(ieee754dp_class(x));
 }

arch/mips/math-emu/ieee754dp.h

@@ -77,6 +77,5 @@ static inline union ieee754dp builddp(int s, int bx, u64 m)
 	return r;
 }
 
-extern int ieee754dp_isnan(union ieee754dp);
 extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp);
 extern union ieee754dp ieee754dp_format(int, int, u64);

arch/mips/math-emu/ieee754sp.c

@@ -30,7 +30,7 @@ int ieee754sp_class(union ieee754sp x)
 	return xc;
 }
 
-int ieee754sp_isnan(union ieee754sp x)
+static inline int ieee754sp_isnan(union ieee754sp x)
 {
 	return ieee754_class_nan(ieee754sp_class(x));
 }

arch/mips/math-emu/ieee754sp.h

@@ -82,6 +82,5 @@ static inline union ieee754sp buildsp(int s, int bx, unsigned m)
 	return r;
 }
 
-extern int ieee754sp_isnan(union ieee754sp);
 extern union ieee754sp __cold ieee754sp_nanxcpt(union ieee754sp);
 extern union ieee754sp ieee754sp_format(int, int, unsigned);