Add missing descriptions of the 'num_vco' and 'flags' members to
clk_alpha_pll structure's documentation. Also reorder the member
description entries to match the order of the declarations.

Eliminates the following warnings:
  drivers/clk/qcom/clk-alpha-pll.h:72: info: Scanning doc for struct clk_alpha_pll
  drivers/clk/qcom/clk-alpha-pll.h:91: warning: Function parameter or struct member 'num_vco' not described in 'clk_alpha_pll'
  drivers/clk/qcom/clk-alpha-pll.h:91: warning: Function parameter or struct member 'flags' not described in 'clk_alpha_pll'

No functional changes.
Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240321-alpha-pll-kerneldoc-v1-1-0d76926b72c3@gmail.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>