net: pcs: Kconfig: Fix unmet dependency warning

Fix the Kconfig dependencies for PCS_RZN1_MIIC to avoid the unmet direct
dependency warning when enabling DWMAC_RENESAS_GBETH. The PCS driver is
used on multiple Renesas SoCs including RZ/N1, RZ/N2H and RZ/T2H, but the
existing condition only allowed ARCH_RZN1, ARCH_R9A09G077, or
ARCH_R9A09G087. This conflicted with the GBETH/GMAC driver which selects
PCS_RZN1_MIIC under ARCH_RENESAS.

Update the dependency to ARCH_RENESAS || COMPILE_TEST so that the PCS
driver is available on all Renesas platforms.

Fixes: 08f89e42121d ("net: pcs: rzn1-miic: Add RZ/T2H MIIC support")
Reported-by: Linux Kernel Functional Testing <[e-mail]>
Closes: https://lore.kernel.org/all/aMlgg_QpJOEDGcEA@monster/
Signed-off-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/pcs/Kconfig

···
 config PCS_RZN1_MIIC
 	tristate "Renesas RZ/N1, RZ/N2H, RZ/T2H MII converter"
 	depends on OF
-	depends on ARCH_RZN1 || ARCH_R9A09G077 || ARCH_R9A09G087 || COMPILE_TEST
+	depends on ARCH_RENESAS || COMPILE_TEST
 	help
 	  This module provides a driver for the MII converter available on
 	  Renesas RZ/N1, RZ/N2H, and RZ/T2H SoCs. This PCS converts MII to