Updated list of supported chipsets for Qualcomm AI Engine backend (#11453)

Summary:
Updated lists of supported chipsets for Qualcomm AI Engine backend from here: https://www.internalfb.com/code/fbsource/[d1941c45a7b0f2bf277fe3176426c3063a80ca91]/fbcode/executorch/backends/qualcomm/utils/utils.py?lines=1010%2C1026

Pull Request resolved: #11453

Reviewed By: cccclai

Differential Revision: D76149590

Author: rohansjoshi

backends/qualcomm/README.md

@@ -21,6 +21,12 @@ Please check `generate_qnn_executorch_compiler_spec()` in
 - Snapdragon 8 Gen 2
 - Snapdragon 8 Gen 3
 - Snapdragon 8 Elite
+- SA8295
+- SSG2115P
+- SSG2125P
+- SXR1230P
+- SXR2230P
+- SXR2330P
 
 ### Adding more supported Chipset
 Currently, users cannot add additional chipset models because the chipset ID is not accessible to community users. If you have specific chipset models you wish to add, please contact one of the authors in the `Code Reviews` section at the bottom of this page.