clk: mvebu: flag the crypto clk as CLK_IGNORE_UNUSED

The crypto SRAM, used by the armada 370 cpuidle code to workaround a bug
in the BootROM code, requires the crypto clk to be up and running.
Flag the crypto clk as IGNORE_UNUSED until we add the proper
infrastructure to define the crypto SRAM in the DT and reference the crypto
clk in this SRAM node.

Reported-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>

drivers/clk/mvebu/armada-370.c

@@ -163,7 +163,7 @@ static const struct clk_gating_soc_desc a370_gating_desc[] __initconst = {
 	{ "pex1", "pex1_en", 9, 0 },
 	{ "sata0", NULL, 15, 0 },
 	{ "sdio", NULL, 17, 0 },
-	{ "crypto", NULL, 23, 0 },
+	{ "crypto", NULL, 23, CLK_IGNORE_UNUSED },
 	{ "tdm", NULL, 25, 0 },
 	{ "ddr", NULL, 28, CLK_IGNORE_UNUSED },
 	{ "sata1", NULL, 30, 0 },