Replaced a few more divisions by RECIP()

platforms/opencl/src/kernels/gbsaObc2.cl

@@ -14,8 +14,8 @@ if (atom1 < NUM_ATOMS && atom2 < NUM_ATOMS && atom1 != atom2) {
     float l_ij2I = l_ijI*l_ijI;
     float u_ij2J = u_ijJ*u_ijJ;
     float u_ij2I = u_ijI*u_ijI;
-    float t1J = LOG(u_ijJ/l_ijJ);
-    float t1I = LOG(u_ijI/l_ijI);
+    float t1J = LOG(u_ijJ*RECIP(l_ijJ));
+    float t1I = LOG(u_ijI*RECIP(l_ijI));
     float t2J = (l_ij2J-u_ij2J);
     float t2I = (l_ij2I-u_ij2I);
     float t3J = t2J*invR;