x86: theadorable-x86-common: Change pci hotplug cmdline parameters (again)

This is needed for the PCIe hotplug to work correctly on some boards
with the newer Linux kernel versions.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/configs/theadorable-x86-common.h

@@ -57,8 +57,7 @@
 	"addmtd=setenv bootargs ${bootargs} ${mtdparts}\0"	\
 	"addmisc=setenv bootargs ${bootargs} "			\
 		"intel-spi.writeable=1 vmalloc=300M "		\
-		"pci=realloc=on,hpmemsize=0x12000000,"		\
-		"hpmemprefsize=0,hpiosize=0\0"	    		\
+		"pci=realloc=on,hpmemsize=0,hpiosize=0\0"	\
 	"bootcmd=if env exists recovery_status;"		\
 		"then run swupdate;"				\
 		"else run yocto_boot;run swupdate;"		\