Revert "libs/libm: fix epsilon relaxation in log and logf"

This reverts commit a2ed0dd.

Author: pkarashchenko

libs/libm/libm/lib_log.c

@@ -98,7 +98,7 @@ double log(double x)
           iter = 0;
         }
 
-      if (iter == 0)
+      if (relax_factor > 1.0)
         {
           epsilon *= relax_factor;
         }

libs/libm/libm/lib_logf.c

@@ -94,7 +94,7 @@ float logf(float x)
           iter = 0;
         }
 
-      if (iter == 0)
+      if (relax_factor > 1.0F)
         {
           epsilon *= relax_factor;
         }