sysutils/firmware/amdsev: Missing path in PLIST

Hi,

Add 'firmware/amdsev/' to PLIST, which was found by sysclean(8).


Index: pkg/PLIST
===================================================================
RCS file: /cvs/ports/sysutils/firmware/amdsev/pkg/PLIST,v
retrieving revision 1.1.1.1
diff -u -p -r1.1.1.1 PLIST
--- pkg/PLIST 29 Oct 2024 20:10:29 -0000 1.1.1.1
+++ pkg/PLIST 1 Nov 2024 08:26:00 -0000
@@ -1,4 +1,5 @@
firmware/amd-sev-license
+firmware/amdsev/
firmware/amdsev/amd_sev_fam17h_model0xh.sbin
firmware/amdsev/amd_sev_fam17h_model3xh.sbin
firmware/amdsev/amd_sev_fam19h_model0xh.sbin