MAINTAINERS: add header file to TI DAVINCI SERIES CLOCK DRIVER

While creating a patch submission on the davinci clock drivers, I noticed
that the header file include/linux/clk/davinci.h belongs to the section
TI DAVINCI SERIES CLOCK DRIVER.

Add a file entry for this header file in TI DAVINCI SERIES CLOCK DRIVER.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220720110026.9173-1-lukas.bulwahn@gmail.comReviewed-by: David Lechner <david@lechnology.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

MAINTAINERS

@@ -20304,6 +20304,7 @@ R:	Sekhar Nori <nsekhar@ti.com>
 S:	Maintained
 F:	Documentation/devicetree/bindings/clock/ti/davinci/
 F:	drivers/clk/davinci/
+F:	include/linux/clk/davinci.h
 
 TI DAVINCI SERIES GPIO DRIVER
 M:	Keerthy <j-keerthy@ti.com>