rtc: ac100: remove misuses of kernel-doc

Prevent kernel-doc warnings by changing "/**" to common comment
format "/*" in non-kernel-doc comments:

drivers/rtc/rtc-ac100.c:103: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 * Clock controls for 3 clock output pins
drivers/rtc/rtc-ac100.c:382: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 * RTC related bits
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc:  <linux-rtc@vger.kernel.org>
Link: https://lore.kernel.org/r/20240114231320.31437-1-rdunlap@infradead.orgSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-ac100.c

@@ -99,7 +99,7 @@ struct ac100_rtc_dev {
 	struct clk_hw_onecell_data *clk_data;
 };
 
-/**
+/*
  * Clock controls for 3 clock output pins
  */
 
@@ -378,7 +378,7 @@ static void ac100_rtc_unregister_clks(struct ac100_rtc_dev *chip)
 	clk_unregister_fixed_rate(chip->rtc_32k_clk->clk);
 }
 
-/**
+/*
  * RTC related bits
  */
 static int ac100_rtc_get_time(struct device *dev, struct rtc_time *rtc_tm)