git grep CONFIG_SW_DEBUG_UART

arch/arm/configs/a12_defconfig:CONFIG_SW_DEBUG_UART=1
arch/arm/configs/a12_nuclear_defconfig:CONFIG_SW_DEBUG_UART=1
arch/arm/configs/a13_defconfig:CONFIG_SW_DEBUG_UART=1
arch/arm/configs/a13_nuclear_defconfig:CONFIG_SW_DEBUG_UART=1
arch/arm/configs/sun5i_defconfig:CONFIG_SW_DEBUG_UART=1
arch/arm/plat-sunxi/include/plat/debug-macro.S:#if CONFIG_SW_DEBUG_UART != 0
arch/arm/plat-sunxi/include/plat/debug-macro.S: add     \rp, \rp, #(0x400 * CONFIG_SW_DEBUG_UART)
arch/arm/plat-sunxi/include/plat/debug-macro.S: add     \rv, \rv, #(0x400 * CONFIG_SW_DEBUG_UART)