linux-gbmc: aspeed-g7: update unused kconfig

Following are not used:
```
CONFIG_PCIE_ASPEED:
   PCIe Root Complex

CONFIG_RTC_DRV_ASPEED:
   Real Time Clock (RTC)

CONFIG_ASPEED_BMC_DEV:
CONFIG_ASPEED_HOST_BMC_DEV:
   Exchange messages and data between the BMC and the Host
   processor over PCIe link.

CONFIG_ASPEED_MCTP:
   MCTP Engine receives Msg which carries MCTP packet
   through PCIe from Host or sends it to Host.

CONFIG_ASPEED_XDMA:
   Transfer data between memory of BMC and Host (via PCIe)

CONFIG_AST2700_OTP:
   One Time Programming Controller

CONFIG_ASPEED_PCIE_MMBI:
   E2M PCIe MMBI feature(E2M is a device used to transfer PCIe bus
   into Memory bus by extra memory remapping control and MMBI
   features.)

CONFIG_PHY_ASPEED_SGMII:
   SGMII mode for ast2700 A1 MAC2
```


Tested:
1. Use following command check kconfig
zcat /proc/config.gz > running.config

Google-Bug-Id: NA
Change-Id: I6c5bafb6430ae17e39e4272a08dd33d09487edde
Signed-off-by: Alan Hung <yung-sheng.huang@fii-na.corp-partner.google.com>
diff --git a/recipes-kernel/linux/files/aspeed-g7-gbmc.cfg b/recipes-kernel/linux/files/aspeed-g7-gbmc.cfg
index f16ff4e..c34791c 100644
--- a/recipes-kernel/linux/files/aspeed-g7-gbmc.cfg
+++ b/recipes-kernel/linux/files/aspeed-g7-gbmc.cfg
@@ -64,7 +64,6 @@
 CONFIG_PCI_IOV=y
 CONFIG_PCI_PRI=y
 CONFIG_PCIE_BUS_SAFE=y
-CONFIG_PCIE_ASPEED=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_DEVTMPFS_SAFE=y
@@ -228,23 +227,15 @@
 CONFIG_MMC_SDHCI_OF_ASPEED=y
 CONFIG_EDAC=y
 CONFIG_RTC_CLASS=y
-CONFIG_RTC_DRV_ASPEED=y
 # CONFIG_VIRTIO_MENU is not set
 CONFIG_COMMON_CLK_AST2700=y
 CONFIG_COMMON_CLK_AST1700=y
 # CONFIG_IOMMU_SUPPORT is not set
-CONFIG_ASPEED_BMC_DEV=y
-CONFIG_ASPEED_HOST_BMC_DEV=y
-CONFIG_ASPEED_MCTP=y
-CONFIG_ASPEED_XDMA=y
 CONFIG_AST2700_ESPI=y
 CONFIG_ASPEED_LPC_PCC=y
-CONFIG_AST2700_OTP=y
-CONFIG_ASPEED_PCIE_MMBI=y
 CONFIG_IIO=y
 CONFIG_ASPEED_ADC=y
 CONFIG_RESET_ASPEED=y
-CONFIG_PHY_ASPEED_SGMII=y
 CONFIG_PHY_ASPEED_USB3=y
 CONFIG_RAS=y
 CONFIG_TEE=y