Philippe 07/12/2021: OpenACC: fix: remove acc loop independent if atomic not...

Philippe 07/12/2021: OpenACC: fix: remove acc loop independent if atomic not set (to compute correctly)
Ideally, the loop independent + atomic should be set but nvhpc 21.9 crashes

src/MNH/ice4_sedimentation_split.f90

@@ -664,7 +664,7 @@ DO WHILE (ANY(ZREMAINT>0.))
   ENDIF
 !$acc kernels
   ZMAX_TSTEP(:,:) = ZREMAINT(:,:)
-!$acc loop independent private(JI,JJ,JK,JL)
+!acc loop independent private(JI,JJ,JK,JL)
   DO CONCURRENT( JL = 1 : ISEDIM )
     JI=I1(JL)
     JJ=I2(JL)