sh4: update memory size, small qemu patch required

target/sh/kernel/qemu-sh

@@ -3,7 +3,7 @@ CONFIG_SUPERH32=y
 CONFIG_CPU_SH4=y
 CONFIG_CPU_SUBTYPE_SH7751R=y
 CONFIG_MEMORY_START=0x0c000000
-CONFIG_MEMORY_SIZE=0x04000000
+CONFIG_MEMORY_SIZE=0x07000000
 CONFIG_29BIT=y
 CONFIG_VSYSCALL=y
 CONFIG_SH_FPU=y
@@ -15,4 +15,3 @@ CONFIG_CMDLINE_EXTEND=y
 CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=2
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
-CONFIG_COMPAT_32BIT_TIME=y