mainboard/dell: align shared product string to 7010/9010

[WuXieSec]

Summary

Follow-up low-risk alignment for #1182: update shared product string for the currently combined 7010/9010 SFF board target.

Change

• src/mainboard/dell/snb_ivb_workstations/Kconfig
  • default "OptiPlex 9010" if BOARD_DELL_OPTIPLEX_9010
  • -> default "OptiPlex 7010/9010" if BOARD_DELL_OPTIPLEX_9010

Why

Current board target is used for shared 7010/9010 SFF support. This keeps user-visible naming aligned with support scope while bigger separation work continues.

Related issue: Dasharo/dasharo-issues#1182

[WuXieSec]

Thanks, you were right. I reworked this to keep separate 7010 and 9010 identification strings, introduced BOARD_DELL_OPTIPLEX_7010, and added the matching Kconfig.name entry. For now both options still point at the existing shared variant directory, so the change stays minimal while preserving the expected product string for DTS detection.

Updated in 98ffd527e3.

[WuXieSec]

@miczyg1 已按您的要求完成修改（commit 98ffd52）：引入了 BOARD_DELL_OPTIPLEX_7010 选项，在 Kconfig.name 添加了对应条目，保持了分开的产品字符串。麻烦重新审查，谢谢。