kconfig: remove meaningless prefixes in defconfig files

Since commit e02ee2548afe (kconfig: switch to single .config
configuration), the prefixes in defconfig files such as "+S:",
"+ST:", etc., are meaningless.

This commit was generated by the following command:

  find configs -name '*_defconfig' | xargs sed -i 's/^+*S*T*://'

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/configs/Ippo_q8h_v1_2_defconfig b/configs/Ippo_q8h_v1_2_defconfig
index 9b0d0dd..0c88edd 100644
--- a/configs/Ippo_q8h_v1_2_defconfig
+++ b/configs/Ippo_q8h_v1_2_defconfig
@@ -9,13 +9,13 @@
 CONFIG_VIDEO_LCD_POWER="PH7"
 CONFIG_VIDEO_LCD_BL_EN="PH6"
 CONFIG_VIDEO_LCD_BL_PWM="PH0"
-+S:CONFIG_ARM=y
-+S:CONFIG_ARCH_SUNXI=y
-+S:CONFIG_MACH_SUN8I=y
-+S:CONFIG_DRAM_CLK=432
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_MACH_SUN8I=y
+CONFIG_DRAM_CLK=432
 # zq = 0xf74a
-+S:CONFIG_DRAM_ZQ=63306
+CONFIG_DRAM_ZQ=63306
 # Wifi power
-+S:CONFIG_AXP221_DLDO1_VOLT=3300
+CONFIG_AXP221_DLDO1_VOLT=3300
 # aldo1 is connected to VCC-IO, VCC-PD, VCC-USB and VCC-HP
-+S:CONFIG_AXP221_ALDO1_VOLT=3000
+CONFIG_AXP221_ALDO1_VOLT=3000