platform/x86: pmc_atom: Add Siemens SIMATIC IPC227E to critclk_systems DMI table

The SIMATIC IPC227E uses the PMC clock for on-board components and gets
stuck during boot if the clock is disabled. Therefore, add this device
to the critical systems list.

Fixes: 648e921888 ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/pmc_atom.c

@@ -415,6 +415,13 @@ static const struct dmi_system_id critclk_systems[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "CB6363"),
 		},
 	},
+	{
+		.ident = "SIMATIC IPC227E",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "6ES7647-8B"),
+		},
+	},
 	{ /*sentinel*/ }
 };