ARM: OMAP2+: Use v7_invalidate_l1 in omap4_finish_suspend

We can use just v7_invalidate_l1 here instead of v7_flush_dcache_all
like the comments say.

Cc: Tero Kristo <t-kristo@ti.com>
Cc: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/sleep44xx.S

@@ -90,12 +90,7 @@ skip_secure_l1_clean:
 	mcr	p15, 0, r0, c1, c0, 0
 	isb
 
-	/*
-	 * Invalidate L1 data cache. Even though only invalidate is
-	 * necessary exported flush API is used here. Doing clean
-	 * on already clean cache would be almost NOP.
-	 */
-	bl	v7_flush_dcache_all
+	bl	v7_invalidate_l1
 
 	/*
 	 * Switch the CPU from Symmetric Multiprocessing (SMP) mode