video: da8xx-fb: clk_get on connection id fck

do clk_get on connection id "fck" to support OMAP based
platforms having multiple clocks for module. Without this
driver change clk_get fails on am335x.

This patch is based on the discussion in community
http://marc.info/?l=linux-kernel&m=135166018907827&w=2

Signed-off-by: Manjunathappa <prakash.pm@ti.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/arch/arm/mach-davinci/da830.c b/arch/arm/mach-davinci/da830.c
index 510648e..678a54a 100644
--- a/arch/arm/mach-davinci/da830.c
+++ b/arch/arm/mach-davinci/da830.c
@@ -408,7 +408,7 @@
 	CLK(NULL,		"pwm2",		&pwm2_clk),
 	CLK("eqep.0",		NULL,		&eqep0_clk),
 	CLK("eqep.1",		NULL,		&eqep1_clk),
-	CLK("da8xx_lcdc.0",	NULL,		&lcdc_clk),
+	CLK("da8xx_lcdc.0",	"fck",		&lcdc_clk),
 	CLK("davinci-mcasp.0",	NULL,		&mcasp0_clk),
 	CLK("davinci-mcasp.1",	NULL,		&mcasp1_clk),
 	CLK("davinci-mcasp.2",	NULL,		&mcasp2_clk),