of: Update qcom vendor prefix description

Update vendor description to be the full name of the corporate entity that
produces the SoCs associated with this prefix.

Acked-by: Olof Johansson <[e-mail]>
Signed-off-by: Kumar Gala <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/vendor-prefixes.txt

···
 picochip	Picochip Ltd
 powervr	PowerVR (deprecated, use img)
 qca	Qualcomm Atheros, Inc.
-qcom	Qualcomm, Inc.
+qcom	Qualcomm Technologies, Inc
 ralink	Mediatek/Ralink Technology Corp.
 ramtron	Ramtron International
 realtek Realtek Semiconductor Corp.