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.org


Reviewed-by: Tero Kristo <kristo@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>