arm: mvebu: Convert board_pex_config() to CONFIG_SPL_BOARD_INIT

The only user of board_pex_config() weak function is A385 controlcenterdc
board. It looks like that code in its board_pex_config() function needs to
be executed after PCIe link is up. Therefore put this code into
spl_board_init() function which is called after a38x serdes initialization,
and therefore it is after the serdes hws_pex_config() function finishes
(which is the state before this change).

With this change completely remove board_pex_config() function as it is not
used anymore.

Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.c b/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.c
index 55c3f9c..b3cbddf 100644
--- a/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.c
+++ b/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.c
@@ -14,11 +14,6 @@
 #include "ctrl_pex.h"
 #include "sys_env_lib.h"
 
-__weak void board_pex_config(void)
-{
-	/* nothing in this weak default implementation */
-}
-
 int hws_pex_config(const struct serdes_map *serdes_map, u8 count)
 {
 	enum serdes_type serdes_type;
@@ -58,7 +53,5 @@
 
 	reg_write(SOC_CONTROL_REG1, tmp);
 
-	board_pex_config();
-
 	return MV_OK;
 }
diff --git a/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.h b/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.h
index 64193d5..abdbe3c 100644
--- a/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.h
+++ b/arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.h
@@ -23,6 +23,5 @@
 #define PCIE4_ENABLE_MASK		(0x1 << PCIE3_ENABLE_OFFS)
 
 int hws_pex_config(const struct serdes_map *serdes_map, u8 count);
-void board_pex_config(void);
 
 #endif
diff --git a/board/gdsys/a38x/controlcenterdc.c b/board/gdsys/a38x/controlcenterdc.c
index dc424f2..243d022 100644
--- a/board/gdsys/a38x/controlcenterdc.c
+++ b/board/gdsys/a38x/controlcenterdc.c
@@ -94,7 +94,7 @@
 	return 0;
 }
 
-void board_pex_config(void)
+void spl_board_init(void)
 {
 #ifdef CONFIG_SPL_BUILD
 	uint k;
diff --git a/configs/controlcenterdc_defconfig b/configs/controlcenterdc_defconfig
index d6844a4..b6eb955 100644
--- a/configs/controlcenterdc_defconfig
+++ b/configs/controlcenterdc_defconfig
@@ -33,6 +33,7 @@
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_LATE_INIT=y
 CONFIG_LAST_STAGE_INIT=y
+CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_SPL_I2C=y
 CONFIG_HUSH_PARSER=y