soc/amd/genoa/chipset.cb: add missing '_' in gpp_bridge_3_b

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I22b9b6781f516b96724b67d1321dd71b98e0e0e3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79410
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>

src/soc/amd/genoa/chipset.cb

@@ -207,7 +207,7 @@ chip soc/amd/genoa
 			device pci 0.5 alias mp0_3 off end # PSP (MP0)
 		end
 
-		device pci 07.2 alias gpp_bridge_3b off
+		device pci 07.2 alias gpp_bridge_3_b off
 			device pci 0.0 alias sata_3_0 off end # first SATA controller; AHCI mode
 			device pci 0.1 alias sata_3_1 off end # second SATA controller; AHCI mode
 		end