regulator: raa215300: Update help description

Add module description to the help section and update the existing
help description.

Reported-by: Pavel Machek <pavel@denx.de>
Closes: https://lore.kernel.org/all/ZN3%2FSjL50ls+3dnD@duo.ucw.cz/
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230818141815.314197-4-biju.das.jz@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: bijudas

drivers/regulator/Kconfig

@@ -1072,7 +1072,11 @@ config REGULATOR_RAA215300
 	depends on COMMON_CLK
 	depends on I2C
 	help
-	  Support for the Renesas RAA215300 PMIC.
+	  If you say yes to this option, support will be included for the
+	  Renesas RAA215300 PMIC.
+
+	  Say M here if you want to include support for Renesas RAA215300 PMIC
+	  as a module. The module will be named "raa215300".
 
 config REGULATOR_RASPBERRYPI_TOUCHSCREEN_ATTINY
 	tristate "Raspberry Pi 7-inch touchscreen panel ATTINY regulator"