[libc] Remove constexpr from math::exp10_range_reduction and math::exp. (#150653)

Author: lntue

libc/src/__support/math/exp.h

@@ -234,7 +234,7 @@ static double set_exceptional(double x) {
 
 namespace math {
 
-static constexpr double exp(double x) {
+LIBC_INLINE static double exp(double x) {
   using FPBits = typename fputil::FPBits<double>;
   FPBits xbits(x);
 

libc/src/__support/math/exp10f16_utils.h

@@ -19,8 +19,7 @@
 
 namespace LIBC_NAMESPACE_DECL {
 
-LIBC_INLINE static constexpr ExpRangeReduction
-exp10_range_reduction(float16 x) {
+LIBC_INLINE static ExpRangeReduction exp10_range_reduction(float16 x) {
   // For -8 < x < 5, to compute 10^x, we perform the following range reduction:
   // find hi, mid, lo, such that:
   //   x = (hi + mid) * log2(10) + lo, in which