rockchip: rk3368: improve Kconfig text for the RK3368

The RK3368 option in Kconfig referred to the RK3328 (copy-and-paste)
and had a few typos and unnecessarily used UTF-8 characters.  While
fixing this, I also reformatted and further clarified the text
(e.g. made the grouping into a a big and little cluster of 4 cores
each explicit).

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/mach-rockchip/Kconfig

@@ -69,12 +69,15 @@ config ROCKCHIP_RK3368
 	select ARM64
 	select SYS_NS16550
 	help
-	  The Rockchip RK3328 is a ARM-based SoC with a octa-core Cortex-A53.
-	  including NEON and GPU, 512KB L2 cache for big cluster and 256 KB
-	  L2 cache for little cluser, PowerVR G6110 based graphics, one video
-	  output processor supporting LVDS、HDMI、eDP, several DDR3 options
-	  and video codec support. Peripherals include Gigabit Ethernet,
-	  USB2 host and OTG, SDIO, I2S, UARTs, SPI, I2C and PWMs.
+	  The Rockchip RK3368 is a ARM-based SoC with a octa-core (organised
+	  into a big and little cluster with 4 cores each) Cortex-A53 including
+	  AdvSIMD, 512KB L2 cache (for the big cluster) and 256 KB L2 cache
+	  (for the little cluster), PowerVR G6110 based graphics, one video
+	  output processor supporting LVDS/HDMI/eDP, several DDR3 options and
+	  video codec support.
+
+	  On-chip peripherals include Gigabit Ethernet, USB2 host and OTG, SDIO,
+	  I2S, UARTs, SPI, I2C and PWMs.
 
 config ROCKCHIP_RK3399
 	bool "Support Rockchip RK3399"