clk: ti: dpll44xx: Fix some potential doc-rot

Fixes the following W=1 kernel build warning(s):

 drivers/clk/ti/dpll44xx.c:114: warning: Function parameter or member 'hw' not described in 'omap4_dpll_regm4xen_recalc'
 drivers/clk/ti/dpll44xx.c:114: warning: Function parameter or member 'parent_rate' not described in 'omap4_dpll_regm4xen_recalc'
 drivers/clk/ti/dpll44xx.c:114: warning: Excess function parameter 'clk' description in 'omap4_dpll_regm4xen_recalc'
 drivers/clk/ti/dpll44xx.c:150: warning: Function parameter or member 'hw' not described in 'omap4_dpll_regm4xen_round_rate'
 drivers/clk/ti/dpll44xx.c:150: warning: Function parameter or member 'parent_rate' not described in 'omap4_dpll_regm4xen_round_rate'
 drivers/clk/ti/dpll44xx.c:150: warning: Excess function parameter 'clk' description in 'omap4_dpll_regm4xen_round_rate'

Cc: Tero Kristo <kristo@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: linux-omap@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210126124540.3320214-11-lee.jones@linaro.orgReviewed-by: Tero Kristo <kristo@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/ti/dpll44xx.c

@@ -102,7 +102,8 @@ static void omap4_dpll_lpmode_recalc(struct dpll_data *dd)
 
 /**
  * omap4_dpll_regm4xen_recalc - compute DPLL rate, considering REGM4XEN bit
- * @clk: struct clk * of the DPLL to compute the rate for
+ * @hw: pointer to the clock to compute the rate for
+ * @parent_rate: clock rate of the DPLL parent
  *
  * Compute the output rate for the OMAP4 DPLL represented by @clk.
  * Takes the REGM4XEN bit into consideration, which is needed for the
@@ -134,8 +135,9 @@ unsigned long omap4_dpll_regm4xen_recalc(struct clk_hw *hw,
 
 /**
  * omap4_dpll_regm4xen_round_rate - round DPLL rate, considering REGM4XEN bit
- * @clk: struct clk * of the DPLL to round a rate for
+ * @hw: struct hw_clk containing the struct clk * of the DPLL to round a rate for
  * @target_rate: the desired rate of the DPLL
+ * @parent_rate: clock rate of the DPLL parent
  *
  * Compute the rate that would be programmed into the DPLL hardware
  * for @clk if set_rate() were to be provided with the rate