vexpress: Initialise the sysregs before setting up the clocks

Following arm64 commit bc3ee18a7a57 (arm64: init: Move of_clk_init to
time_init()), vexpress_osc_of_setup() is called via of_clk_init() long
before initcalls are issued. Initialising the vexpress oscillators
requires the vespress sysregs to be already initialised, so this patch
adds an explicit call to vexpress_sysreg_of_early_init() in vexpress
oscillator setup function.

Signed-off-by: Catalin Marinas <[e-mail]>
Tested-by: Will Deacon <[e-mail]>
Acked-by: Will Deacon <[e-mail]>
Tested-by: Pawel Moll <[e-mail]>
Acked-by: Pawel Moll <[e-mail]>
Cc: Mike Turquette <[e-mail]>

drivers/clk/versatile/clk-vexpress-osc.c

···
 	struct clk *clk;
 	u32 range[2];
 
+	vexpress_sysreg_of_early_init();
+
 	osc = kzalloc(sizeof(*osc), GFP_KERNEL);
 	if (!osc)
 		return;