[PATCH] drm/radeon: add quirck for MSI R7 370

[mrader3940 at yandex.ru]

From: Maxim Sheviakov <mrader3940 at yandex.ru>

Just adds the quirck for MSI R7 370 Armor 2X
Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=91294

Signed-off-by: Maxim Sheviakov <mrader3940 at yandex.ru>
---

--- /home/maxik/linux/drivers/gpu/drm/radeon/si_dpm.c.orig	2015-09-23 22:49:45.462513212 +0000
+++ /home/maxik/linux/drivers/gpu/drm/radeon/si_dpm.c	2015-09-23 22:51:00.082510451 +0000
@@ -2927,6 +2927,7 @@ static struct si_dpm_quirk si_dpm_quirk_
 	{ PCI_VENDOR_ID_ATI, 0x6810, 0x1462, 0x3036, 0, 120000 },
 	{ PCI_VENDOR_ID_ATI, 0x6811, 0x174b, 0xe271, 0, 120000 },
 	{ PCI_VENDOR_ID_ATI, 0x6810, 0x174b, 0xe271, 85000, 90000 },
+	{ PCI_VENDOR_ID_ATI, 0x6811, 0x1462, 0x2015, 0, 120000 },
 	{ 0, 0, 0, 0 },
 };