Scale tideamp to L/T instead of Z/T

- Setting BBL_USE_TIDAL_BG = True causes the model to fail dimensional consistency test.  If you set the spatial scale as m_to_L instead of m_to_Z in MOM_set_viscosity it fixes the issue.
- Fixing documentation fo L/T scaling of tideamp
  - Change suggested Hallberg

Author: brandon.reichl

src/parameterizations/vertical/MOM_set_viscosity.F90

@@ -133,7 +133,7 @@ module MOM_set_visc
   ! Allocatable data arrays
   real, allocatable, dimension(:,:) :: cdrag_u !< The spatially varying quadratic drag coefficient [nondim]
   real, allocatable, dimension(:,:) :: cdrag_v !< The spatially varying quadratic drag coefficient [nondim]
-  real, allocatable, dimension(:,:) :: tideamp !< RMS tidal amplitude at h points [Z T-1 ~> m s-1]
+  real, allocatable, dimension(:,:) :: tideamp !< RMS tidal amplitude at h points [L T-1 ~> m s-1]
   ! Diagnostic arrays
   real, allocatable, dimension(:,:) :: bbl_u !< BBL mean U current [L T-1 ~> m s-1]
   real, allocatable, dimension(:,:) :: bbl_v !< BBL mean V current [L T-1 ~> m s-1]
@@ -3298,7 +3298,7 @@ subroutine set_visc_init(Time, G, GV, US, param_file, diag, visc, CS, restart_CS
       allocate(CS%tideamp(isd:ied,jsd:jed), source=0.0)
       filename = trim(CS%inputdir) // trim(tideamp_file)
       call log_param(param_file, mdl, "INPUTDIR/TIDEAMP_FILE", filename)
-      call MOM_read_data(filename, tideamp_var, CS%tideamp, G%domain, scale=US%m_to_Z*US%T_to_s)
+      call MOM_read_data(filename, tideamp_var, CS%tideamp, G%domain, scale=US%m_s_to_L_T)
       call pass_var(CS%tideamp,G%domain)
     endif
   endif