Sync upstream FreeBSD libm.

Test: treehugger
Change-Id: I583a3e93821d512c975db34fc1610ffd22445d58
diff --git a/libm/upstream-freebsd/lib/msun/src/e_powf.c b/libm/upstream-freebsd/lib/msun/src/e_powf.c
index 122da45..f5a2c70 100644
--- a/libm/upstream-freebsd/lib/msun/src/e_powf.c
+++ b/libm/upstream-freebsd/lib/msun/src/e_powf.c
@@ -56,7 +56,7 @@
 ivln2_l  =  7.0526075433e-06; /* 0x36eca570 =1/ln2 tail*/
 
 float
-__ieee754_powf(float x, float y)
+powf(float x, float y)
 {
 	float z,ax,z_h,z_l,p_h,p_l;
 	float y1,t1,t2,r,s,sn,t,u,v,w;
@@ -108,7 +108,7 @@
 	if(hy==0x40000000) return x*x; /* y is  2 */
 	if(hy==0x3f000000) {	/* y is  0.5 */
 	    if(hx>=0)	/* x >= +0 */
-	    return __ieee754_sqrtf(x);
+	    return sqrtf(x);
 	}
 
 	ax   = fabsf(x);