ARM: imx: disable pll8_mlb in mx6q_clks

The MLB PLL clock's operation doesn't fit for clock framework and
it should be handled internally in MLB driver.
Remove initialization of pll8_mlb clock device but leave its
declaration in mx6q_clks to avoid affecting imx6q clock numbering.
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
CC: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/clk-imx6q.c

@@ -312,7 +312,6 @@ int __init mx6q_clocks_init(void)
 	clk[pll5_video]    = imx_clk_pllv3(IMX_PLLV3_AV,	"pll5_video",	"osc", base + 0xa0, 0x7f);
 	clk[pll6_enet]     = imx_clk_pllv3(IMX_PLLV3_ENET,	"pll6_enet",	"osc", base + 0xe0, 0x3);
 	clk[pll7_usb_host] = imx_clk_pllv3(IMX_PLLV3_USB,	"pll7_usb_host","osc", base + 0x20, 0x3);
-	clk[pll8_mlb]      = imx_clk_pllv3(IMX_PLLV3_MLB,	"pll8_mlb",	"osc", base + 0xd0, 0x0);
 
 	/*
 	 * Bit 20 is the reserved and read-only bit, we do this only for: