clk: create meson directory and move related drivers

In order to support the Amlogic G12A clock controller,
re-architect the clock files into a meson directory.

No functionnal changes.

MAINTAINERS entry is also updated.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index f9ee428..f5c1e70 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -93,7 +93,7 @@
 T:	git git://git.denx.de/u-boot-amlogic.git
 F:	arch/arm/mach-meson/
 F:	arch/arm/include/asm/arch-meson/
-F:	drivers/clk/clk_meson*
+F:	drivers/clk/meson/
 F:	drivers/serial/serial_meson.c
 F:	drivers/reset/reset-meson.c
 F:	drivers/i2c/meson_i2c.c