Vulkan: Fix Turnip driver version string

The version string handling was adding 512 to the major version for all
Qualcomm devices to work around a quirk in the proprietary driver.

This breaks the version string for Turnip (the open-source Mesa driver
for Qualcomm GPUs), turning a version like 26.1.99 into 538.1.99.

Bug: angleproject:42267006
Change-Id: Ia23bde5a799f29fa7d17be153d1f18cd00c2397d
Signed-off-by: Valentine Burley <valentine.burley@collabora.com>
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/7885698
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com>
Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>

src/libANGLE/renderer/vulkan/vk_renderer.cpp

diff --git a/src/libANGLE/renderer/vulkan/vk_renderer.cpp b/src/libANGLE/renderer/vulkan/vk_renderer.cpp
index 9fd124e..e7b0b11 100644
--- a/src/libANGLE/renderer/vulkan/vk_renderer.cpp
+++ b/src/libANGLE/renderer/vulkan/vk_renderer.cpp
@@ -5032,7 +5032,10 @@
         // The major version for the new QCOM drivers seems to be 512, which results in a major
         // version of 0 and a non-zero variant field when using the VK_API_VERSION_x macros.
         // Therefore, the version string is updated to show the correct major version.
-        else if (mPhysicalDeviceProperties.vendorID == VENDOR_ID_QUALCOMM)
+        else if (mPhysicalDeviceProperties.vendorID == VENDOR_ID_QUALCOMM &&
+                 !IsQualcommOpenSource(mPhysicalDeviceProperties.vendorID,
+                                       mDriverProperties.driverID,
+                                       mPhysicalDeviceProperties.deviceName))
         {
             strstr << (512 | VK_API_VERSION_MAJOR(driverVersion)) << ".";
             strstr << VK_API_VERSION_MINOR(driverVersion) << ".";