ideapad-laptop: Add Lenovo Yoga 900 to no_hw_rfkill dmi list

Like some of the other Yoga models the Lenovo Yoga 900 does not have a
hw rfkill switch, and trying to read the hw rfkill switch through the
ideapad module causes it to always reported blocking breaking wifi.

This commit adds the Lenovo Yoga 900 to the no_hw_rfkill dmi list, fixing
the wifi breakage.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1275490
Cc: [e-mail]
Reported-and-tested-by: Kevin Fenzi <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>
Signed-off-by: Darren Hart <[e-mail]>

drivers/platform/x86/ideapad-laptop.c

···
 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
 		},
 	},
+	{
+		.ident = "Lenovo Yoga 900",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
+		},
+	},
 	{}
 };