[PATCH v3] qemu-riscv64_smode: fix extlinux (define preboot)

[Dimitri John Ledkov]

Commit 37304aaf60bf ("Convert CONFIG_USE_PREBOOT and CONFIG_PREBOOT to
Kconfig") removed preboot commands in RISC-V targets and broke
extlinux support as reported by Fu Wei <wefu at redhat.com>.

The patch finishes migration of CONFIG_USE_PREBOOT and CONFIG_REBOOT
to Kconfig.

Fixes: 37304aaf60bf ("Convert CONFIG_USE_PREBOOT and CONFIG_PREBOOT to Kconfig")
Reported-By: Fu Wei <wefu at redhat.com>
Signed-off-by: David Abdurachmanov <david.abdurachmanov at sifive.com>
Signed-off-by: Dimitri John Ledkov <dimitri.ledkov at canonical.com>
---

 changes since my v1 patch:
 - Add reported-by & fixes tags
 changes since my v2 patch:
 - use savedefconfig to order defconfig correctly

 Original patch author is David Abdurachmanov

 Previously this was submitted in 2019
 https://patchwork.ozlabs.org/project/uboot/patch/20190821190720.4286-1-david.abdurachmanov@sifive.com/

 Since then the sifive fu540 portion of this change was merged, but
 not the qemu one.

 Submitting the qemu portion again. Without this change, qemu smode
 cannot boot Ubuntu's riscv64 cloud images with extlinux.conf.

 configs/qemu-riscv64_smode_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configs/qemu-riscv64_smode_defconfig b/configs/qemu-riscv64_smode_defconfig
index 0000564e41..4a6416e254 100644
--- a/configs/qemu-riscv64_smode_defconfig
+++ b/configs/qemu-riscv64_smode_defconfig
@@ -6,6 +6,8 @@ CONFIG_ARCH_RV64I=y
 CONFIG_RISCV_SMODE=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
+CONFIG_USE_PREBOOT=y
+CONFIG_PREBOOT="setenv fdt_addr ${fdtcontroladdr}; fdt addr ${fdtcontroladdr};"
 CONFIG_DISPLAY_CPUINFO=y
 CONFIG_DISPLAY_BOARDINFO=y
 CONFIG_CMD_BOOTEFI_SELFTEST=y
-- 
2.30.2