kernel: ALSA: scarlett2: Add missing error checks to *_ctl_get()

In the Linux kernel, the following vulnerability has been resolved: ALSA: scarlett2: Add missing error checks to ctlget The Linux kernel CVE team has assigned CVE-2023-52680 to this issue. Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051750-CVE-2023-52680-1f4a@gregkh/T...