arm: k3: Enable instruction cache for main domain SPL

Change spl_enable_dcache so it also enable icache on SPL
initialization for the main domain part of the boot flow. This
improves bootloader booting time.

Link: https://lore.kernel.org/all/20231109140958.1093235-1-joao.goncalves@toradex.com/
Signed-off-by: Joao Paulo Goncalves <joao.goncalves@toradex.com>
Tested-by: Nishanth Menon <nm@ti.com>
diff --git a/arch/arm/mach-k3/j721s2_init.c b/arch/arm/mach-k3/j721s2_init.c
index 39499be..fb0708b 100644
--- a/arch/arm/mach-k3/j721s2_init.c
+++ b/arch/arm/mach-k3/j721s2_init.c
@@ -231,7 +231,7 @@
 		if (ret)
 			panic("DRAM 1 init failed: %d\n", ret);
 	}
-	spl_enable_dcache();
+	spl_enable_cache();
 }
 
 /* Support for the various EVM / SK families */